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U.S. Army Signal Corps - Public Domain
Lopezda -
ArchMatthewLiu - CC BY-SA 4.0
unknown - Public Domain
US Government Printing Office - Public Domain
RobertoTenore - CC BY-SA 4.0
unknown -
Caro.lalonde - CC BY-SA 3.0
George G. Rockwood - Public Domain
J. de Bane & H. Bary - Public Domain
George Eastman House - Public Domain
Theodoor Matham - Public Domain
Charles R. Cross - Public Domain
Atmundi - CC BY-SA 3.0
Agence Meurisse - Public Domain
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Otto, William T., 1816-1905
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Grenville, Richard, Sir, 1541?-1591
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U.S. Army Signal Corps - Public Domain
Rhodes, Charles Dudley, 1865-1948
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Lopezda -
Kernberg, Otto F., 1928-....
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ArchMatthewLiu - CC BY-SA 4.0
Corrigan, Peter, 1941-
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Ochman, Wiesław
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Johnson, J. Rosamond (John Rosamond), 1873-1954
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Danning, Christian, 1867-1925
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unknown - Public Domain
Sachau, Eduard, 1845-1930
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US Government Printing Office - Public Domain
Kilday, Paul Joseph, 1900-1968
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RobertoTenore - CC BY-SA 4.0
Oberg, James E., 1944-
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unknown -
Turner, Benjamin Brecknell, 1815-1894
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Savile, Henry, Sir, 1549-1622
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Franco, Battista, 1510?-1561
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Caro.lalonde - CC BY-SA 3.0
Denton, James S.
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George G. Rockwood - Public Domain
Cox, Louise Howland King, 1865-1945
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Wedel, Georg Wolffgang, 1645-1721
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Agate, Alfred T., 1812-1846
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J. de Bane & H. Bary - Public Domain
Aitzema, Lieuwe van 1600-1669
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George Eastman House - Public Domain
Russell, Charles Edward, 1860-1941
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Butts, Mary, 1890-1937
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Mirou, Anton, 1578-1627?
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Theodoor Matham - Public Domain
Velde, Jan van de, 1568-1623
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unknown - Public Domain
Morehead, James T. (James Turner), 1797-1854
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Charles R. Cross - Public Domain
Crafts, James Mason, 1839-1917
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Gorman, Tom, 1919-
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Simonton, Charles Bryson, 1838-1911
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Atmundi - CC BY-SA 3.0
Dassanowsky, Elfriede von
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Lie, Trygve, 1896-1968
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Agence Meurisse - Public Domain
Herriot, Édouard, 1872-1957