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GFHund - CC BY 3.0
TantalumTelluride -
Anthony Sands - Public Domain
unknown - Public Domain
Truejustice - CC BY-SA 3.0
Harris & Ewing - Public Domain
New York World-Telegram and the Sun staff photographer - Public Domain
PrincoWal - CC BY-SA 3.0
unknown autor - Public Domain
Jholland14226 - CC BY-SA 4.0
U.S. Government Printing Office. - Public Domain
Elisa Cabot - CC BY-SA 2.0
John Alexander Cooper - Public Domain
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GFHund - CC BY 3.0
Bieberbach, Ludwig, 1886-1982
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TantalumTelluride -
Blount, Winton M. (Winton Malcolm), 1921-2002
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Levy, Jefferson M. (Jefferson Monroe), 1852-1924
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Ruggles-Brise, Evelyn, Sir, 1857-1935
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Anthony Sands - Public Domain
Sandys, Frederick, 1829-1904
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Ford, Ruth, 1911-2009
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unknown - Public Domain
Prado, Mariano Ignacio, 1826-1902
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Sommerfeld, Arnold, 1868-1951
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Truejustice - CC BY-SA 3.0
Robertson, Robbie
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Holley, Robert W.
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Harris & Ewing - Public Domain
Seeger, Charles, 1886-1979
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Irvin, Monte, 1919-
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Tulasne, Louis-René (1815-1885).
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Bolyai, Farkas, 1775-1856
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David-Néel, Alexandra, 1868-1969
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New York World-Telegram and the Sun staff photographer - Public Domain
Campanella, Roy, 1921-1993
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Martos, Borys, 1879-1977
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PrincoWal - CC BY-SA 3.0
McLaughlin, Peter, 1953-....
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Raemaekers, Louis, 1869-1956
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Nedim, Ahmet, 1681-1730
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Diels, Rudolf, 1900-1957
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unknown autor - Public Domain
Brossard, Sébastien de, 1655-1730
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Jholland14226 - CC BY-SA 4.0
Holland, Norman Norwood, 1927-....
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Clancy, Robert H. (Robert Henry), 1882-1962
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Karasz, Mariska, 1898-1960
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Leslie, Charles Robert, 1794-1859
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U.S. Government Printing Office. - Public Domain
Scrivner, Errett P. (Errett Power), 1898-1978
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Elisa Cabot - CC BY-SA 2.0
Puig, Manuel
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John Alexander Cooper - Public Domain
Peterson, William, 1856-1921
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unknown - Public Domain
Andreä, Johann Valentin, 1586-1654