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unknown - Public Domain
TheCatalyst31 - CC0 1.0
Fabvee - CC BY-SA 3.0
Karsten11 - Public Domain
BritPharmSoc - CC BY 3.0
Rowanwindwhistler - CC BY-SA 3.0
Foto-AG Gymnasium Melle - CC BY 3.0
George Grantham Bain Collection (Library of Congress) - Public Domain
Public Domain
W. A. Croffut - Public Domain
War of the Nations, New York Times Co., New York, 1919 - Public Domain
Curt Alexander (dies 1920), her husband - Public Domain
Natalia Bargel - CC BY-SA 4.0
Eric Koch / Anefo -
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Ridley, Nicholas, 1500?-1555
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unknown - Public Domain
Schlesinger, Leon, 1884-1949
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Closky, Claude, 1963-....
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TheCatalyst31 - CC0 1.0
North, Sterling, 1906-1974
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unknown - Public Domain
Horn, Camilla, 1903-1996
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Dean, William F. (William Frishe), 1899-1981
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Swing, Joseph M. (Joseph May), 1894-1984
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Fabvee - CC BY-SA 3.0
Frank, Pierre
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Brooks, John, 1752-1825
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Karsten11 - Public Domain
Beaumont, Hanneke, 1947-....
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Brumbaugh, A. J. (Aaron John), 1890-1983
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BritPharmSoc - CC BY 3.0
Taylor, Doris A.
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Coxcie, Michel, 1499-1592
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Malherbe, François de, 1555-1628
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Rowanwindwhistler - CC BY-SA 3.0
Liang, Qichao, 1873-1929
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unknown - Public Domain
Wilson, Benjamin Davis, 1811-1878
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Foto-AG Gymnasium Melle - CC BY 3.0
Brantner, Franziska
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George Grantham Bain Collection (Library of Congress) - Public Domain
Gogorza, Emilio de
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Public Domain
Clarke, Alured, Sir, 1744 or 1745-1832
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W. A. Croffut - Public Domain
Field, David D. (David Dudley), 1781-1867
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unknown - Public Domain
Du Pont, T. Coleman (Thomas Coleman), 1863-1930
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Thompson, William Oxley, 1855-1933
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Pierpont, James, 1660-1714
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War of the Nations, New York Times Co., New York, 1919 - Public Domain
Berthelot, Henri-Mathias, 1861-1931
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Henson, Leslie
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Curt Alexander (dies 1920), her husband - Public Domain
Bogan, Louise, 1897-1970
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Natalia Bargel - CC BY-SA 4.0
Friedman, Rose D.
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Ortega del Villar, Aniceto, 1825-1875
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Semple, Robert, 1873-1955
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Eric Koch / Anefo -
Sawada, Kyōichi, 1936-1970