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United States Congress - Public Domain
nicolas genin - CC BY-SA 2.0
ETH Zürich - CC BY-SA 3.0
Étienne Bocourt after Charles Reutlinger - Public Domain
Pierce, C.C. (Charles C.), 1861-1946 - Public Domain
unknown - Public Domain
:Category:Arthur James Melhuish - Public Domain
Spcsnvsnjmc - CC BY-SA 3.0
Henry Phelps Johnston - Public Domain
Unidentified photographer - Public Domain
Unknown - Public Domain
author - Public Domain
Daniel Hartwig - CC BY 2.0
anonymous - Public Domain
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Glisson, Francis, 1597-1677
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Paso, Juan José 1758-1833
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Tauscher, Ellen O. (Ellen O'Kane), 1951-2019
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Macdonnell, Richard Graves, 1814-1881
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United States Congress - Public Domain
D'Alesandro, Thomas, 1903-1987
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nicolas genin - CC BY-SA 2.0
Snipes, Wesley
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ETH Zürich - CC BY-SA 3.0
Kuhn, Richard, 1900-1967
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Geel, Jacob, 1789-1862
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Young, Charles A. (Charles Augustus), 1834-1908
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Torricelli, Evangelista, 1608-1647
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Étienne Bocourt after Charles Reutlinger - Public Domain
Patin, M. (Henri), 1793-1876
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Pierce, C.C. (Charles C.), 1861-1946 - Public Domain
Wingfield, George, 1876-1959
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Walker, Clifford, 1877-
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unknown - Public Domain
Maitland, Thomas, 1759?-1824
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Giacometti, Giovanni, 1868-1933
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unknown - Public Domain
Spafford, Horatio Gates, 1828-1888
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Maturana, Humberto R., 1928-....
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:Category:Arthur James Melhuish - Public Domain
Rawlinson, Henry Creswicke, Sir, 1810-1895
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Spcsnvsnjmc - CC BY-SA 3.0
Clay, Grady.
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Katsura, Tarō, 1847-1913
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Henry Phelps Johnston - Public Domain
Morris, James, 1752-1820
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Whitney, Henry M. (Henry Martyn), 1824-1904
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Unidentified photographer - Public Domain
Leroux, Xavier, 1863-1919
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Unknown - Public Domain
Roger, Henri, 1809-1891
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author - Public Domain
Polk, Lucius Eugene, 1833-1892
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unknown - Public Domain
Stroop, Paul D. (Paul David), 1904-1995
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Champlain, Samuel de, 1574-1635
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Daniel Hartwig - CC BY 2.0
Brown, Neil, 1980-
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Axentowicz, Teodor, 1859-1938
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anonymous - Public Domain
Jastrow, Joseph, 1863-1944