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da - Public Domain
Moses King (1853-1909), author. Bartlett & Company, the Orr Press (New York, NY), publishers. - Public Domain
original uploader - Public Domain
Published by Boston City Council - Public Domain
Public Domain
unknown - Public Domain
Marcelo de Montalvão - CC BY-SA 4.0
Brigham Young University - Public Domain
Porter Hovey at http://www.porterhovey.com/ - CC BY-SA 3.0
Max Rosenthal (ca. 1810-1890) <br/> - Public Domain
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Yang, Chen Ning, 1922-....
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da - Public Domain
Henriques, Fini, 1867-1940
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Moses King (1853-1909), author. Bartlett & Company, the Orr Press (New York, NY), publishers. - Public Domain
Hyde, Henry Baldwin, 1834-1899
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Barrett, Lawrence, 1838-1891
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original uploader - Public Domain
Rabl, Carl, 1853-1917
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Ward, John Quincy Adams, 1830-1910
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Mittermaier, C. J. A. (Carl Joseph Anton), 1787-1867
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Published by Boston City Council - Public Domain
Trotter, William Monroe, 1872-1934
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Stanley, Francis Edgar, 1849-1918
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Public Domain
Canalizo, Valentín 1794-1850
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unknown - Public Domain
Paul, Bruno, 1874-1968
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Willard, Joseph Edward, 1865-1924
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Spoerri, Daniel, 1930-....
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Arduino, Giovanni, 1714-1795
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Hildebrandt, Eduard, 1818-1869
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Scudder, Isaac W. (Isaac Williamson), 1816-1881
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Evans, George, 1797-1867
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Marcelo de Montalvão - CC BY-SA 4.0
Garcia, Léa 1933-
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Brigham Young University - Public Domain
Eyring, Carl F. (Carl Ferdinand), 1889-1951
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Porter Hovey at http://www.porterhovey.com/ - CC BY-SA 3.0
Casebere, James
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Mac Neill, Eoin, 1867-1945
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Davis, Horace, 1831-1916
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Max Rosenthal (ca. 1810-1890) <br/> - Public Domain
Burke, Aedanus, 1743-1802
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unknown - Public Domain
Biggs, J. Crawford (James Crawford), 1872-1960
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Pavel, Ota, 1930-
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original uploader - Public Domain
Tryon, William, 1729-1788
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Latham, Arlie, 1860-1952
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Wensley, Penny
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Frölicher, Otto 1840-1890
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unknown - Public Domain
Pangborn, Clyde Edward, approximately 1893-1958