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AxelHH - CC BY 3.0
Mingle MediaTV - CC BY-SA 2.0
Unknown Montana State University -
anonymous - Public Domain
David Morier - Public Domain
Unknown - Public Domain
Tobias Stimmler - Public Domain
Jan Vilímek - Public Domain
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Mario Monteforte Toledo - Public Domain
unknown - Public Domain
Webb, William Larkin - Public Domain
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Kasznar, Kurt, 1913-1979
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Hengelbrock, Thomas
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MacMurray, Fred, 1908-1991
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Osorio, Mariano, 1777-1819
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Mingle MediaTV - CC BY-SA 2.0
Ross, Charlotte, 1968-
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Unknown Montana State University -
Breeden, John W., 1904-1977
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anonymous - Public Domain
Mornay, Philippe de, seigneur du Plessis-Marly, 1549-1623
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David Morier - Public Domain
Morier, David
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Unknown - Public Domain
Cushing, Harvey, 1869-1939
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Gastoldi, Giovanni Giacomo, active 1582-1609
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Tobias Stimmler - Public Domain
Frisius, Johannes, 1505-1565
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Médici, Emílio Garrastazu, 1905-1985
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Jan Vilímek - Public Domain
Vrchlický, Jaroslav, 1853-1912
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Klauber, Laurence Monroe, 1883-1968
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Von Holst, H. (Hermann), 1841-1904
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Joule, James Prescott, 1818-1889
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Dollo, Louis, 1857-1931
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Mario Monteforte Toledo - Public Domain
Monteforte Toledo, Mario.
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Wiley, Catherine, 1879-1958
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unknown - Public Domain
Breaux, Cléoma 1905-1941
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unknown - Public Domain
Huang, Xing, 1874-1916
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Webb, William Larkin - Public Domain
See, T. J. J. (Thomas Jefferson Jackson), 1866-
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Fujiyama, Aiichirō, 1897-1985
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unknown - Public Domain
Gorham, William R., 1888-1949
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Yoshida, Shigeru, 1878-1967
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Sewall, Arthur, 1835-1900
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Fisk, Carlton, 1947-
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Cybis, Jan, 1897-1972
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unknown - Public Domain
Hausmann, Johann Friedrich Ludwig, 1782-1859
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Kennedy, Douglas, 1915-1973