ISBN beginnend mit 9783385388

• ISBN 3385388007: John Howard Payne: The Life and Writings of John Howard Payne


• ISBN 9783385388000: John Howard Payne: The Life and Writings of John Howard Payne


• ISBN 3385388015: John Howard Payne: The Life and Writings of John Howard Payne


• ISBN 9783385388017: John Howard Payne: The Life and Writings of John Howard Payne


• ISBN 9783385388024: Farrar, Frederic William: The Life of Christ / Vol. I / Frederic William Farrar / Taschenbuch / Paperback / Englisch / 2024 / Outlook Verlag / EAN 9783385388024


• ISBN 3385388031: Frederic William Farrar: The Life of Christ


• ISBN 9783385388031: Frederic William Farrar: The Life of Christ


• ISBN 338538804X: Henry Ostrander: The Life of Henry Ostrander, D.D. With Selected Sermons


• ISBN 9783385388048: Henry Ostrander: The Life of Henry Ostrander, D.D. With Selected Sermons


• ISBN 3385388058: Henry Ostrander: The Life of Henry Ostrander, D.D. With Selected Sermons


• ISBN 9783385388055: Henry Ostrander: The Life of Henry Ostrander, D.D. With Selected Sermons


• ISBN 3385388066: Henry Carrington Alexander: The Life of Joseph Addison Alexander, D.D. Professor in the Theological Seminary at Princeton, New Jersey


• ISBN 9783385388062: Henry Carrington Alexander: The Life of Joseph Addison Alexander, D.D. Professor in the Theological Seminary at Princeton, New Jersey


• ISBN 3385388074: Henry Carrington Alexander: The Life of Joseph Addison Alexander, D.D. Professor in the Theological Seminary at Princeton, New Jersey


• ISBN 9783385388079: Henry Carrington Alexander: The Life of Joseph Addison Alexander, D.D. Professor in the Theological Seminary at Princeton, New Jersey


• ISBN 3385388082: John F. Marlay: The Life of Rev. Thomas A. Morris. Late Senior Bishop of the Methodist Episcopal Church


• ISBN 9783385388086: John F. Marlay: The Life of Rev. Thomas A. Morris. Late Senior Bishop of the Methodist Episcopal Church


• ISBN 3385388090: John F. Marlay: The Life of Rev. Thomas A. Morris. Late Senior Bishop of the Methodist Episcopal Church


• ISBN 9783385388093: John F. Marlay: The Life of Rev. Thomas A. Morris. Late Senior Bishop of the Methodist Episcopal Church


• ISBN 9783385388109: Prime, Samuel Irenæus: The Life of Samuel F.B. Morse, LL. D., Inventor of the Electro-magnetic Recording Telegraph / Samuel Irenæus Prime / Taschenbuch / Paperback / Englisch / 2024 / Outlook Verlag / EAN 9783385388109


• ISBN 3385388112: Samuel Irenæus Prime: The Life of Samuel F.B. Morse, LL. D., Inventor of the Electro-magnetic Recording Telegraph


• ISBN 9783385388116: Samuel Irenæus Prime: The Life of Samuel F.B. Morse, LL. D., Inventor of the Electro-magnetic Recording Telegraph


• ISBN 3385388120: James C. Edwards: The Little Red Lounge. Or, Beechers Fix January and May in a New Dress


• ISBN 9783385388123: James C. Edwards: The Little Red Lounge. Or, Beechers Fix January and May in a New Dress


• ISBN 3385388139: Laurens Perseus Hickok: The Logic of Reason, Universal and Eternal


• ISBN 9783385388130: Laurens Perseus Hickok: The Logic of Reason, Universal and Eternal


• ISBN 3385388147: Laurens Perseus Hickok: The Logic of Reason, Universal and Eternal


• ISBN 9783385388147: Laurens Perseus Hickok: The Logic of Reason, Universal and Eternal


• ISBN 3385388155: Thomas Manson Norwood: The Louisiana Law


• ISBN 9783385388154: Thomas Manson Norwood: The Louisiana Law


• ISBN 3385388163: Thomas Manson Norwood: The Louisiana Law


• ISBN 9783385388161: Thomas Manson Norwood: The Louisiana Law


• ISBN 3385388171: Andrew Shuman: The Loves of a Lawyer, his Quandary, and How it Came Out


• ISBN 9783385388178: Andrew Shuman: The Loves of a Lawyer, his Quandary, and How it Came Out


• ISBN 338538818X: Andrew Shuman: The Loves of a Lawyer, his Quandary, and How it Came Out


• ISBN 9783385388185: Andrew Shuman: The Loves of a Lawyer, his Quandary, and How it Came Out


• ISBN 3385388198: Richard Hooker Wilmer: The Loyal Spectre. Or, the True Hearts of Atlanta


• ISBN 9783385388192: Richard Hooker Wilmer: The Loyal Spectre. Or, the True Hearts of Atlanta


• ISBN 3385388201: Richard Hooker Wilmer: The Loyal Spectre. Or, the True Hearts of Atlanta


• ISBN 9783385388208: Richard Hooker Wilmer: The Loyal Spectre. Or, the True Hearts of Atlanta


• ISBN 9783385388215: Kalidasa: The Málavikágnimitra. A Sanskrit Play / Kalidasa (u. a.) / Taschenbuch / Paperback / Englisch / 2024 / Outlook Verlag / EAN 9783385388215


• ISBN 3385388228: Kalidasa: The Málavikágnimitra. A Sanskrit Play


• ISBN 9783385388222: Kalidasa: The Málavikágnimitra. A Sanskrit Play


• ISBN 3385388236: Edward Hertslet: The Map of Europe by Treaty. Showing the Various Political and Territorial Changes Which Have Taken Place Since the General Peace of 1814. With Numerous Maps and Notes


• ISBN 9783385388239: Edward Hertslet: The Map of Europe by Treaty. Showing the Various Political and Territorial Changes Which Have Taken Place Since the General Peace of 1814. With Numerous Maps and Notes


• ISBN 3385388244: Edward Hertslet: The Map of Europe by Treaty. Showing the Various Political and Territorial Changes Which Have Taken Place Since the General Peace of 1814. With Numerous Maps and Notes


• ISBN 9783385388246: Edward Hertslet: The Map of Europe by Treaty. Showing the Various Political and Territorial Changes Which Have Taken Place Since the General Peace of 1814. With Numerous Maps and Notes


• ISBN 3385388252: Henry Moseley: The Mechanical Principles of Engineering and Architecture


• ISBN 9783385388253: Henry Moseley: The Mechanical Principles of Engineering and Architecture


• ISBN 3385388260: Henry Moseley: The Mechanical Principles of Engineering and Architecture


• ISBN 9783385388260: Henry Moseley: The Mechanical Principles of Engineering and Architecture


• ISBN 3385388279: Edward H. Dickinson: The Medicine of the Ancients. An Introductory Address Delivered at the Liverpool Royal Infirmary School of Medicine, October 2nd, 1875


• ISBN 9783385388277: Edward H. Dickinson: The Medicine of the Ancients. An Introductory Address Delivered at the Liverpool Royal Infirmary School of Medicine, October 2nd, 1875


• ISBN 3385388287: Edward H. Dickinson: The Medicine of the Ancients. An Introductory Address Delivered at the Liverpool Royal Infirmary School of Medicine, October 2nd, 1875


• ISBN 9783385388284: Edward H. Dickinson: The Medicine of the Ancients. An Introductory Address Delivered at the Liverpool Royal Infirmary School of Medicine, October 2nd, 1875


• ISBN 3385388295: William Benjamin Carpenter: The Microscope and its Revelations


• ISBN 9783385388291: William Benjamin Carpenter: The Microscope and its Revelations


• ISBN 3385388309: William Benjamin Carpenter: The Microscope and its Revelations


• ISBN 9783385388307: William Benjamin Carpenter: The Microscope and its Revelations


• ISBN 3385388317: J. F.: The Miller O'Duddingston. Or the Betrothal


• ISBN 9783385388314: J. F.: The Miller O'Duddingston. Or the Betrothal


• ISBN 3385388325: J. F.: The Miller O'Duddingston. Or the Betrothal


• ISBN 9783385388321: J. F.: The Miller O'Duddingston. Or the Betrothal


• ISBN 3385388333: Julia Helen Watts Twells: The Mills of the Gods. A Novel


• ISBN 9783385388338: Julia Helen Watts Twells: The Mills of the Gods. A Novel


• ISBN 3385388341: Julia Helen Watts Twells: The Mills of the Gods. A Novel


• ISBN 9783385388345: Julia Helen Watts Twells: The Mills of the Gods. A Novel


• ISBN 338538835X: C. J. Orrick: The Mineral Resources and Manufacturing Facilities of the City of Cumberland


• ISBN 9783385388352: C. J. Orrick: The Mineral Resources and Manufacturing Facilities of the City of Cumberland


• ISBN 3385388368: Christopher Wordsworth: The Holy Bible. The Minor Prophets. In the Authorized Version, with Notes and Introductions


• ISBN 9783385388369: Christopher Wordsworth: The Holy Bible. The Minor Prophets. In the Authorized Version, with Notes and Introductions


• ISBN 3385388376: Christopher Wordsworth: The Holy Bible. The Minor Prophets. In the Authorized Version, with Notes and Introductions


• ISBN 9783385388376: Christopher Wordsworth: The Holy Bible. The Minor Prophets. In the Authorized Version, with Notes and Introductions


• ISBN 9783385388383: Logan, Algernon Sydney: The Mirror of a Mind. A Poem / Algernon Sydney Logan / Taschenbuch / Paperback / Englisch / 2024 / Outlook Verlag / EAN 9783385388383


• ISBN 3385388392: Algernon Sydney Logan: The Mirror of a Mind. A Poem


• ISBN 9783385388390: Algernon Sydney Logan: The Mirror of a Mind. A Poem


• ISBN 9783385388406: Hamerton, Eugénie: The Mirror of Truth and Other Marvellous Histories / Eugénie Hamerton / Taschenbuch / Paperback / Englisch / 2024 / Outlook Verlag / EAN 9783385388406


• ISBN 3385388414: Eugénie Hamerton: The Mirror of Truth and Other Marvellous Histories


• ISBN 9783385388413: Eugénie Hamerton: The Mirror of Truth and Other Marvellous Histories


• ISBN 9783385388420: Higgins, Alvin S.: The Mishaps of Mr. Ezekiel Pelter / Alvin S. Higgins / Taschenbuch / Paperback / Englisch / 2024 / Outlook Verlag / EAN 9783385388420


• ISBN 3385388430: Alvin S. Higgins: The Mishaps of Mr. Ezekiel Pelter


• ISBN 9783385388437: Alvin S. Higgins: The Mishaps of Mr. Ezekiel Pelter


• ISBN 9783385388444: Doré, Gustave: The Myths of the Rhine / Gustave Doré (u. a.) / Taschenbuch / Paperback / Englisch / 2024 / Outlook Verlag / EAN 9783385388444


• ISBN 3385388457: Gustave Doré: The Myths of the Rhine


• ISBN 9783385388451: Gustave Doré: The Myths of the Rhine


• ISBN 3385388465: William A. Shinn: The National Bankruptcy Register Reports, Containing All the Important Bankruptcy Decisions in the United States


• ISBN 9783385388468: William A. Shinn: The National Bankruptcy Register Reports, Containing All the Important Bankruptcy Decisions in the United States


• ISBN 3385388473: William A. Shinn: The National Bankruptcy Register Reports, Containing All the Important Bankruptcy Decisions in the United States


• ISBN 9783385388475: William A. Shinn: The National Bankruptcy Register Reports, Containing All the Important Bankruptcy Decisions in the United States


• ISBN 3385388481: Eliza Ann Youmans: The Natural History of Man. A Course of Elementary Lectures


• ISBN 9783385388482: Eliza Ann Youmans: The Natural History of Man. A Course of Elementary Lectures


• ISBN 338538849X: Eliza Ann Youmans: The Natural History of Man. A Course of Elementary Lectures


• ISBN 9783385388499: Eliza Ann Youmans: The Natural History of Man. A Course of Elementary Lectures


• ISBN 9783385388505: Hunt, John P.: The New Pocket Guide and Street Directory of Philadelphia / John P. Hunt / Taschenbuch / Paperback / Englisch / 2024 / Outlook Verlag / EAN 9783385388505


• ISBN 3385388511: John P. Hunt: The New Pocket Guide and Street Directory of Philadelphia


• ISBN 9783385388512: John P. Hunt: The New Pocket Guide and Street Directory of Philadelphia


• ISBN 9783385388529: Lytton, Edward Bulwer: The New Timon, St. Stephen's and The Lost Tales of Miletus / Edward Bulwer Lytton / Taschenbuch / Paperback / Englisch / 2024 / Outlook Verlag / EAN 9783385388529


• ISBN 3385388538: Edward Bulwer Lytton: The New Timon, St. Stephen's and The Lost Tales of Miletus


• ISBN 9783385388536: Edward Bulwer Lytton: The New Timon, St. Stephen's and The Lost Tales of Miletus


• ISBN 9783385388543: Radcliffe, Frederick Peter Delmé: The Noble Science. A Few General Ideas on Fox-hunting, for the Use of the Rising Generation of Sportsmen / Frederick Peter Delmé Radcliffe / Taschenbuch / Paperback / Englisch / 2024 / Outlook Verlag


• ISBN 3385388554: Frederick Peter Delmé Radcliffe: The Noble Science. A Few General Ideas on Fox-hunting, for the Use of the Rising Generation of Sportsmen


• ISBN 9783385388550: Frederick Peter Delmé Radcliffe: The Noble Science. A Few General Ideas on Fox-hunting, for the Use of the Rising Generation of Sportsmen


• ISBN 3385388562: Paul Christian Sinding: The Northmen. The Sea-kings and Vikings, Their Manners and Customs, Discoveries, Maritime Expeditions, Struggles and Wars Up to Present Time


• ISBN 9783385388567: Paul Christian Sinding: The Northmen. The Sea-kings and Vikings, Their Manners and Customs, Discoveries, Maritime Expeditions, Struggles and Wars Up to Present Time


• ISBN 3385388570: Paul Christian Sinding: The Northmen. The Sea-kings and Vikings, Their Manners and Customs, Discoveries, Maritime Expeditions, Struggles and Wars Up to Present Time


• ISBN 9783385388574: Paul Christian Sinding: The Northmen. The Sea-kings and Vikings, Their Manners and Customs, Discoveries, Maritime Expeditions, Struggles and Wars Up to Present Time


• ISBN 9783385388581: Wyld, Robert Stodart: The Physics and Philosophy of the Senses / Robert Stodart Wyld / Taschenbuch / Paperback / Englisch / 2024 / Outlook Verlag / EAN 9783385388581


• ISBN 3385388597: Robert Stodart Wyld: The Physics and Philosophy of the Senses


• ISBN 9783385388598: Robert Stodart Wyld: The Physics and Philosophy of the Senses


• ISBN 3385388600: Henry George Bohn: The Pinetum. Being a Synopsis of All the Coniferous Plants at Present Known, with Descriptins, History and Synonyms, and a Comprehensive Systematic Index


• ISBN 9783385388604: Henry George Bohn: The Pinetum. Being a Synopsis of All the Coniferous Plants at Present Known, with Descriptins, History and Synonyms, and a Comprehensive Systematic Index


• ISBN 3385388619: Henry George Bohn: The Pinetum. Being a Synopsis of All the Coniferous Plants at Present Known, with Descriptins, History and Synonyms, and a Comprehensive Systematic Index


• ISBN 9783385388611: Henry George Bohn: The Pinetum. Being a Synopsis of All the Coniferous Plants at Present Known, with Descriptins, History and Synonyms, and a Comprehensive Systematic Index


• ISBN 3385388627: Walter Scott: The Pirate


• ISBN 9783385388628: Walter Scott: The Pirate


• ISBN 3385388635: Walter Scott: The Pirate


• ISBN 9783385388635: Walter Scott: The Pirate


• ISBN 9783385388642: Leyden, John: The Poetical Works of Dr. John Leyden / John Leyden / Taschenbuch / Paperback / Englisch / 2024 / Outlook Verlag / EAN 9783385388642


• ISBN 3385388651: John Leyden: The Poetical Works of Dr. John Leyden


• ISBN 9783385388659: John Leyden: The Poetical Works of Dr. John Leyden


• ISBN 338538866X: John Nichol: The Poetical Works of Sydney Dobell


• ISBN 9783385388666: John Nichol: The Poetical Works of Sydney Dobell


• ISBN 3385388678: John Nichol: The Poetical Works of Sydney Dobell


• ISBN 9783385388673: John Nichol: The Poetical Works of Sydney Dobell


• ISBN 9783385388680: Rossetti, William Michael: The Poetical Works of William Blake, Lyrical ad Miscellaneous / William Michael Rossetti (u. a.) / Taschenbuch / Paperback / Englisch / 2024 / Outlook Verlag / EAN 9783385388680


• ISBN 3385388694: William Michael Rossetti: The Poetical Works of William Blake, Lyrical ad Miscellaneous


• ISBN 9783385388697: William Michael Rossetti: The Poetical Works of William Blake, Lyrical ad Miscellaneous


• ISBN 3385388708: Herbert Spencer: The Principles of Biology


• ISBN 9783385388703: Herbert Spencer: The Principles of Biology


• ISBN 3385388716: Herbert Spencer: The Principles of Biology


• ISBN 9783385388710: Herbert Spencer: The Principles of Biology


• ISBN 3385388724: Daniel Webster: The Private Correspondence of Daniel Webster


• ISBN 9783385388727: Daniel Webster: The Private Correspondence of Daniel Webster


• ISBN 3385388732: Daniel Webster: The Private Correspondence of Daniel Webster


• ISBN 9783385388734: Daniel Webster: The Private Correspondence of Daniel Webster


• ISBN 3385388740: Stuart Rendel: The Question of the Guns as Now Debated


• ISBN 9783385388741: Stuart Rendel: The Question of the Guns as Now Debated


• ISBN 3385388759: Stuart Rendel: The Question of the Guns as Now Debated


• ISBN 9783385388758: Stuart Rendel: The Question of the Guns as Now Debated


• ISBN 3385388767: Hannah Whitall Smith: The Record of a Happy Life. Being Memorials of Franklin Whitall Smith, a Student of Princeton College


• ISBN 9783385388765: Hannah Whitall Smith: The Record of a Happy Life. Being Memorials of Franklin Whitall Smith, a Student of Princeton College


• ISBN 3385388775: Hannah Whitall Smith: The Record of a Happy Life. Being Memorials of Franklin Whitall Smith, a Student of Princeton College


• ISBN 9783385388772: Hannah Whitall Smith: The Record of a Happy Life. Being Memorials of Franklin Whitall Smith, a Student of Princeton College


• ISBN 3385388783: David Greene Haskins: The Requisites for a Church School, and the Adaptedness of the Protestant Episcopal Church for the Work of Religious Education


• ISBN 9783385388789: David Greene Haskins: The Requisites for a Church School, and the Adaptedness of the Protestant Episcopal Church for the Work of Religious Education


• ISBN 3385388791: William Ricketts Cooper: The Resurrection of Assyria. A Lecture Delivered in Renfield Presbyterian Church, Glasgow, on January 31, 1875


• ISBN 9783385388796: William Ricketts Cooper: The Resurrection of Assyria. A Lecture Delivered in Renfield Presbyterian Church, Glasgow, on January 31, 1875


• ISBN 3385388805: William Ricketts Cooper: The Resurrection of Assyria. A Lecture Delivered in Renfield Presbyterian Church, Glasgow, on January 31, 1875


• ISBN 9783385388802: William Ricketts Cooper: The Resurrection of Assyria. A Lecture Delivered in Renfield Presbyterian Church, Glasgow, on January 31, 1875


• ISBN 9783385388819: Moulton, Charles William: The Review of General Sherman's Memoirs Examined, Chiefly in the Light of its Own Evidence / Charles William Moulton / Taschenbuch / Paperback / Englisch / 2024 / Outlook Verlag / EAN 9783385388819


• ISBN 3385388821: Charles William Moulton: The Review of General Sherman's Memoirs Examined, Chiefly in the Light of its Own Evidence


• ISBN 9783385388826: Charles William Moulton: The Review of General Sherman's Memoirs Examined, Chiefly in the Light of its Own Evidence


• ISBN 338538883X: Charles Kingsley: The Roman and the Teuton. A Series of Lectures Delivered Before the University of Cambridge


• ISBN 9783385388833: Charles Kingsley: The Roman and the Teuton. A Series of Lectures Delivered Before the University of Cambridge


• ISBN 3385388848: Charles Kingsley: The Roman and the Teuton. A Series of Lectures Delivered Before the University of Cambridge


• ISBN 9783385388840: Charles Kingsley: The Roman and the Teuton. A Series of Lectures Delivered Before the University of Cambridge


• ISBN 3385388856: James Augustus Henry Murray Thomas: The Romance and Prophecies of Thomas of Erceldoune. Printed from Five Manuscripts


• ISBN 9783385388857: James Augustus Henry Murray Thomas: The Romance and Prophecies of Thomas of Erceldoune. Printed from Five Manuscripts


• ISBN 3385388864: James Augustus Henry Murray Thomas: The Romance and Prophecies of Thomas of Erceldoune. Printed from Five Manuscripts


• ISBN 9783385388864: James Augustus Henry Murray Thomas: The Romance and Prophecies of Thomas of Erceldoune. Printed from Five Manuscripts


• ISBN 9783385388871: Dall, Caroline Wells Healey: The Romance of the Association. Or, One Last Glimpse of Charlotte Temple and Eliza Wharton. A Curiosity of Literature and Life / Caroline Wells Healey Dall / Taschenbuch / Paperback / Englisch / 2024


• ISBN 3385388880: Caroline Wells Healey Dall: The Romance of the Association. Or, One Last Glimpse of Charlotte Temple and Eliza Wharton. A Curiosity of Literature and Life


• ISBN 9783385388888: Caroline Wells Healey Dall: The Romance of the Association. Or, One Last Glimpse of Charlotte Temple and Eliza Wharton. A Curiosity of Literature and Life


• ISBN 3385388899: Caroline Wells Healey Dall: The Romance of the Association. Or, One Last Glimpse of Charlotte Temple and Eliza Wharton. A Curiosity of Literature and Life


• ISBN 9783385388895: Caroline Wells Healey Dall: The Romance of the Association. Or, One Last Glimpse of Charlotte Temple and Eliza Wharton. A Curiosity of Literature and Life


• ISBN 3385388902: Caroline Wells Healey Dall: The Romance of the Association. Or, One Last Glimpse of Charlotte Temple and Eliza Wharton. A Curiosity of Literature and Life


• ISBN 9783385388901: Caroline Wells Healey Dall: The Romance of the Association. Or, One Last Glimpse of Charlotte Temple and Eliza Wharton. A Curiosity of Literature and Life


• ISBN 3385388910: Samuel Beal: The Romantic Legend of Sâkya Buddha. From the Chinese-Sanscrit


• ISBN 9783385388918: Samuel Beal: The Romantic Legend of Sâkya Buddha. From the Chinese-Sanscrit


• ISBN 3385388929: Samuel Beal: The Romantic Legend of Sâkya Buddha. From the Chinese-Sanscrit


• ISBN 9783385388925: Samuel Beal: The Romantic Legend of Sâkya Buddha. From the Chinese-Sanscrit


• ISBN 3385388937: James Mccosh: The Royal Law of Love. The Baccalaureate Sermon Preached Before the College of New Jersey June 27, 1875


• ISBN 9783385388932: James Mccosh: The Royal Law of Love. The Baccalaureate Sermon Preached Before the College of New Jersey June 27, 1875


• ISBN 9783385388949: Kalidasa: The Sacontala. Or, the Fatal Ring / Kalidasa (u. a.) / Taschenbuch / Paperback / Englisch / 2024 / Outlook Verlag / EAN 9783385388949


• ISBN 3385388953: Kalidasa: The Sacontala. Or, the Fatal Ring


• ISBN 9783385388956: Kalidasa: The Sacontala. Or, the Fatal Ring


• ISBN 9783385388963: Hensley, Lewis: The Scholar's Algebra. An Introductory Work on Algebra / Lewis Hensley / Taschenbuch / Paperback / Englisch / 2024 / Outlook Verlag / EAN 9783385388963


• ISBN 338538897X: Lewis Hensley: The Scholar's Algebra. An Introductory Work on Algebra


• ISBN 9783385388970: Lewis Hensley: The Scholar's Algebra. An Introductory Work on Algebra


• ISBN 3385388988: Sedley Taylor: The Science of Music. Or, The Physical Basis of Musical Harmony


• ISBN 9783385388987: Sedley Taylor: The Science of Music. Or, The Physical Basis of Musical Harmony


• ISBN 3385388996: Sedley Taylor: The Science of Music. Or, The Physical Basis of Musical Harmony


• ISBN 9783385388994: Sedley Taylor: The Science of Music. Or, The Physical Basis of Musical Harmony