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Ned Snyder - CC BY 3.0
Keith Allison - CC BY-SA 2.0
Antonio de La Gandara - Public Domain
Mostb - CC BY-SA 3.0
George Grantham Bain Collection (Library of Congress) - Public Domain
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unknown - Public Domain
Tina Juretzek - CC BY-SA 3.0
James Granger - Public Domain
Tduk - CC BY-SA 4.0
Frontispiece to Friendship in Death 1752 - Public Domain
unknown -
Department of Housing and Urban Development - Public Domain
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Ned Snyder - CC BY 3.0
Meneeley, Ed
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Keith Allison - CC BY-SA 2.0
McCoy, Colt
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Loos, Adolf, 1870-1933
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Zermelo, Ernst, 1871-1953
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Butterfield, Justin, 1790-1855
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Somerville, William, 1771-1860
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Natividad, Kitten
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Antonio de La Gandara - Public Domain
La Gandara, Antonio de, 1861-1917
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Mostb - CC BY-SA 3.0
Sallah, Tijan M., 1958-....
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Kelly, Edward, 1555-1595?
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George Grantham Bain Collection (Library of Congress) - Public Domain
Fonck, René, 1894-1953
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Original uploader was --Goku -
Carteret, Philip, -1796
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Seutter, Matthaeus, 1678-1756
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Hermlin, Stephan
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unknown - Public Domain
Richards, William Trost, 1833-1905
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Tina Juretzek - CC BY-SA 3.0
Juretzek, Tina, 1952-
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Halifax, Charles Wood, Viscount, 1800-1885
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James Granger - Public Domain
Greatrakes, Valentine, 1629-1683
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Cesarotti, Melchiorre, 1730-1808
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Tduk - CC BY-SA 4.0
Danky, James Philip, 1947-
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Friedrich, Caspar David, 1774-1840
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Tilden, William A. (William Augustus), Sir, 1842-1926
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Frontispiece to Friendship in Death 1752 - Public Domain
Rowe, Elizabeth Singer, 1674-1737
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Eichler, August Wilhelm, 1839-1887
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Plantamura, Carol
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unknown - Public Domain
Fletcher, Donald
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Crawford, Fred L. (Fred Lewis), 1888-1957
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unknown -
Occhialini, Giuseppe, 1907-1993.
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Lee, Francis Lightfoot, 1734-1797
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Department of Housing and Urban Development - Public Domain
Weaver, Robert C. (Robert Clifton), 1907-1997