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Dick DeMarsico, World Telegram staff photographer - Public Domain
film screenshot (RKO Pictures) - Public Domain
from photo by pirot - Public Domain
Thomon - Public Domain
Sumori - CC BY-SA 3.0
martinscriminalcode - CC BY-SA 3.0
Dillonsherlock - CC BY-SA 4.0
Gavril Kirillin - CC BY-SA 3.0
Radio News Staff - Public Domain
© Eric Schaal / Weidle Verlag - CC BY-SA 3.0
unknown - Public Domain
Steve Punter - CC BY 2.0
Moonik - CC BY-SA 3.0
as cited RVD (although unlikely because it did not exist at the time) - Public Domain
Brady National Photographic Art Gallery - Public Domain
Bain News Service, publisher - Public Domain
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Shovell, Clowdisley, Sir, 1650-1707
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Wilson, Hugh Robert, 1885-1946
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Vanderbilt, Frederick William, 1856-1938
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Dick DeMarsico, World Telegram staff photographer - Public Domain
Feiffer, Jules
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Sanois, Jean-François-Joseph de La Motte-Geffrard, comte de, 1723-1799
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film screenshot (RKO Pictures) - Public Domain
Powers, Mala, 1931-2007
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Safford, Truman Henry, 1836-1901
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from photo by pirot - Public Domain
Bazin, René, 1853-1932
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Irwin, James B. (James Benson)
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Thomon - Public Domain
Mundelein, George William, 1872-1939
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Coster, Charles de, 1827-1879
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Sumori - CC BY-SA 3.0
Clark, W.C., 1939-
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Viardot-García, Pauline, 1821-1910
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Young, Thomas, 1773-1829
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martinscriminalcode - CC BY-SA 3.0
Greenspan, Edward L.
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Dillonsherlock - CC BY-SA 4.0
Gaines, Steve
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Gavril Kirillin - CC BY-SA 3.0
Nikolaev, M. E. (Mikhail Efimovich), 1937-
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Radio News Staff - Public Domain
Gernsback, Hugo
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© Eric Schaal / Weidle Verlag - CC BY-SA 3.0
Křenek, Ernst
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unknown - Public Domain
Blackwall, John, 1790-1881
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Steve Punter - CC BY 2.0
Hamilton, Christine
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Taché, Eugène-Étienne 1836-1912
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Moonik - CC BY-SA 3.0
Savart, Félix
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Smejkal, Jan
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as cited RVD (although unlikely because it did not exist at the time) - Public Domain
Van Raalte, Albertus C. (Albertus Christiaan), 1811-1876
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Goldthwaite, George, 1809-1879
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Wood, Benjamin, 1820-1900
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Brady National Photographic Art Gallery - Public Domain
Rosecrans, William S. (William Starke), 1819-1898
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Bain News Service, publisher - Public Domain
Morris, Roland S. (Roland Sletor), 1874-1945
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Hassall, Arthur-Hill, 1817-1894