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unknown - Public Domain
BmoreArt - CC BY-SA 3.0
NASA - Public Domain
unknown - CC BY-SA 4.0
Lionel Allorge - CC BY-SA 3.0
Ruben Ortega - CC BY-SA 4.0
Иван Абатуров - CC BY-SA 4.0
Pi3.124 - CC BY-SA 3.0
chattingjason (Jason Chatting) - CC BY 2.0
Mathew Brady Levin Corot Handy - Public Domain
Josef Kriehuber (1800 -1876); Foto Ud - Public Domain
Johan Blaeu - Public Domain
U.S. Navy - Public Domain
Illustration is uncited, but the journal editors are: Charles Dudley Warner, Hamilton Wright Mabie, Mrs. Lucia Isabella (Gilbert) Runkle, George H. Warner - Public Domain
ורד אדיר - CC BY-SA 3.0
anonymous - Public Domain
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unknown - Public Domain
Dowling, Michael J., 1866-1921
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BmoreArt - CC BY-SA 3.0
Leake, Eugene, 1911-2005
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NASA - Public Domain
Reilly, James F., II, 1954-
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Souchon, Alain.
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Clark, David Aaron
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unknown - CC BY-SA 4.0
Casimir, John, Prince Of Anhalt-Dessau
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Villard, Henry, 1835-1900
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Lionel Allorge - CC BY-SA 3.0
Drucker, Michel, 1942-....
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Ruben Ortega - CC BY-SA 4.0
Barroso, Mariano, 1959-....
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Иван Абатуров - CC BY-SA 4.0
Oppitz, Gerhard
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Pi3.124 - CC BY-SA 3.0
Neighbors, Robert Simpson, 1815-1859
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Romberger, James
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chattingjason (Jason Chatting) - CC BY 2.0
Odonnell, Rosie
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Davis, Charles, 1933-
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Mathew Brady Levin Corot Handy - Public Domain
McCormick, Richard C. (Richard Cunningham), 1832-1901
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unknown - Public Domain
Krehl, Stephan, 1864-1924
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Pisier, Marie-France
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Josef Kriehuber (1800 -1876); Foto Ud - Public Domain
Russell, Odo, Sir, 1829-1884
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Johan Blaeu - Public Domain
Constable, Henry, 1562-1613
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Chandler, Jeff, 1918-1961
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U.S. Navy - Public Domain
Jenkins, Reuben E. (Reuben Ellis), 1896-1975
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Moore, Clayton, 1914-1999
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Illustration is uncited, but the journal editors are: Charles Dudley Warner, Hamilton Wright Mabie, Mrs. Lucia Isabella (Gilbert) Runkle, George H. Warner - Public Domain
Barlow, Jane, 1857?-1917
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Paumann, Conrad
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Fraser, Malcolm, 1930-....
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MacLafferty, James H. (James Henry), 1871-1937
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unknown - Public Domain
Zetterstéen, K.V. (Karl Vilhelm), 1866-1953
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ורד אדיר - CC BY-SA 3.0
Tartakover, David
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anonymous - Public Domain
Pynchon, William, 1590-1662
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Deming, Alison Hawthorne, 1946-....