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Christina112 - CC BY-SA 4.0
ETH Zürich - CC BY-SA 3.0
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Gage Skidmore - CC BY-SA 3.0
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unknown - Public Domain
Slowking4 -
Mathew Brady Levin Corot Handy - Public Domain
Professor Bop - CC BY 2.0
US Government Printing Office - Public Domain
Nicht zu ermittelnder Fotograf der Epoche. - Public Domain
GFHund - CC BY 3.0
ServiceAT - CC BY-SA 3.0
Cornell Alumni Association - Public Domain
A. J. D. Stewart. - Public Domain
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Alboni, Marietta, 1823-1894
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Christina112 - CC BY-SA 4.0
Cummings, Albert
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ETH Zürich - CC BY-SA 3.0
Prelog, V. (Vladimir), 1906-1998
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Commercial photo made for hire - Public Domain
Stuart-Young, John Moray, 1881-1939
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Hernández, Juano 1901-1970
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Hertz, Joseph H. (Joseph Herman), 1872-1946
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Gage Skidmore - CC BY-SA 3.0
McFarlane, Todd.
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Box, John C. (John Calvin), 1871-1941
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Gage Skidmore - CC BY-SA 3.0
Pill, Alison, 1985-
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Name of photographer not given. - Public Domain
Lloyd, C.G. (Curtis Gates), 1859-1926
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unknown - Public Domain
Terman, Lewis M. (Lewis Madison), 1877-1956
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Hutton, William, 1723-1815
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Bravais, Auguste, 1811-1863
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unknown - Public Domain
Dykes, Eva Beatrice, 1893-
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Slowking4 -
Dunn, Stephen, 1939-
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Thomson, William, 1819-1890
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Mathew Brady Levin Corot Handy - Public Domain
Frelinghuysen, Frederick T. (Frederick Theodore), 1817-1885
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Barrett, Florence
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Professor Bop - CC BY 2.0
Wilson, Cassandra, 1955-....
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Lisgar, John Young, Baron, 1807-1876
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unknown - Public Domain
Arce, Ramón José de 1755-1844
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US Government Printing Office - Public Domain
Blanchard, James J., 1942-
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Nicht zu ermittelnder Fotograf der Epoche. - Public Domain
Kramer, Leopold
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GFHund - CC BY 3.0
Mulliken, Robert Sanderson
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Castro, Richard Thomas, 1946-1991
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ServiceAT - CC BY-SA 3.0
Weinberger, Peter J.
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Cornell Alumni Association - Public Domain
Schmidt, Nathaniel, 1862-1939
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Powell, William, 1735-1769
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Segar, E. C. (Elzie Crisler), 1894-1938
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A. J. D. Stewart. - Public Domain
Knox, Samuel, 1815-1905