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Kuczyński - Public Domain
Parliament of New Zealand - Public Domain
unknown - Public Domain
original uploader - Public Domain
Juneangel42 - CC BY 3.0
Avjoska - CC BY 3.0
Tabercil - CC BY-SA 2.5
anonymous/unknown - Public Domain
United States Marine Corps photo - Public Domain
August Weger - Public Domain
Ainsworth R. Spofford is listed as "Advisory Editor" with numerous other authors cited as contributors. No specific citation for the image illustrator - Public Domain
Unknown - Public Domain
20th Century Fox - Public Domain
nicht lesbar - Public Domain
Office of the Surgeon General - Public Domain
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Kuczyński - Public Domain
Taubenschlag, Rafał, 1881-1958
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Waddington, W. H. (William Henry), 1826-1894
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Parliament of New Zealand - Public Domain
Thorn, James, 1882-1956
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Nash, Philleo, 1909-1987
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Jeaurat, Edme-Sébastien, 1725-1803
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Cuoco, Francisco, 1933-
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unknown - Public Domain
Caymmi, Dorival
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Axentowicz, Teodor, 1859-1938
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original uploader - Public Domain
McLean, John, 1791-1830
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Juneangel42 - CC BY 3.0
Sassone, Marco Massimo, 1942-
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Logan, M. M. (Marvel Mills), 1874-1939
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Avjoska - CC BY 3.0
Beidao, 1949-....
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Tabercil - CC BY-SA 2.5
Dancy, Hugh, 1975-....
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Mi︠a︡skovskiǐ, N. (Nikolaǐ), 1881-1950
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anonymous/unknown - Public Domain
Lewandowski, Louis, 1821-1894
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Burton, William E. (William Evans), 1802-1860
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United States Marine Corps photo - Public Domain
Brown, Wilburt Scott, 1900-1968
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August Weger - Public Domain
Satter, Gustave
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Ainsworth R. Spofford is listed as "Advisory Editor" with numerous other authors cited as contributors. No specific citation for the image illustrator - Public Domain
Shannon, James, 1799-1859
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Ebsen, Buddy, 1908-2003.
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Dickinson, W. Howship (William Howship), 1832-1913
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Savonarola, Girolamo, 1452-1498
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Unknown - Public Domain
Ward, George Hull, 1826-1863
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Hondecoeter, Melchior de 1636-1695
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20th Century Fox - Public Domain
Philips, Lee, 1927-1999
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nicht lesbar - Public Domain
Ersch, Johann Samuel, 1766-1828
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Abbott, Joseph Palmer, 1891-1965
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unknown - Public Domain
Rockwell, Julius, 1805-1888
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Office of the Surgeon General - Public Domain
Forwood, W. H. (William Henry), 1838-1915
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Cleveland, H. W. S. (Horace William Shaler), 1814-1900