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not stated - Public Domain
Rochester Institute of Technology -
w:George Huddesford - Public Domain
Jslipscomb - CC BY-SA 3.0
Public Domain
Notman Photography, Boston - Public Domain
Danlee Mitchell. -
louisepalanker - CC BY-SA 2.0
unknown - Public Domain
bep - CC BY 3.0
original uploader - Public Domain
Ludwig von Herterich - Public Domain
Tuttle, Charles Richard - Public Domain
International Center for Archives of Jewish Music - CC BY-SA 4.0
Judgefloro - CC BY-SA 3.0
Eva Blue - CC BY 2.0
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Freier, Recha
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not stated - Public Domain
Lefèvre, Edwin (1871-1943).
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Kwolek, Stephanie, 1923-
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Rochester Institute of Technology -
Álvarez Bravo, Manuel, 1902-2002
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w:George Huddesford - Public Domain
Huddesford, George, 1749-1809
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Jslipscomb - CC BY-SA 3.0
Lipscomb, William N.
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Public Domain
Baylies, Francis, 1783-1852
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Notman Photography, Boston - Public Domain
Calkins, Mary Whiton, 1863-1930
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Danlee Mitchell. -
Brown, Robert E. (Robert Edward), 1927-2005
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Thacher, Thomas D. (Thomas Day), 1881-1950
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louisepalanker - CC BY-SA 2.0
Goffin, Louise
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unknown - Public Domain
Wharton, Gabriel Colvin, 1824-1906
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Cagnoni, Antonio
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Moore, Henry Ruthven, Sir, 1886-1978
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Sheldon, Charles M., 1857-1946
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Wollaston, William Hyde, 1766-1828
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bep - CC BY 3.0
Temple, Peter, 1946-....
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original uploader - Public Domain
Herndon, William Lewis, 1813-1857
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Hungerford, Charles Frederick Algernon Portal, Viscount Portal of, 1893-1971
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Uesugi, Yōzan, 1751-1822
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Ludwig von Herterich - Public Domain
Herterich, Ludwig von 1856-1932
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Tuttle, Charles Richard - Public Domain
Burt, William Austin, 1792-1858
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International Center for Archives of Jewish Music - CC BY-SA 4.0
Olshanetsky, Alexander
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Magni, Valeriano, 1587-1661
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Judgefloro - CC BY-SA 3.0
Taruc, Luis, 1913-2005
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Eva Blue - CC BY 2.0
Aislin
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Dolkart, Andrew
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Andreu Estrany, Mariano, 1888-1976
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Acocella, Joan Ross
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Mukhina, Vera Ignatʹevna, 1889-1953