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Machahn - Public Domain
Holmes, John Haynes - Public Domain
NASA - Public Domain
Public Domain
George Albert Smith - Public Domain
Katrina Afonso - CC BY-SA 4.0
Posluşnicu, Mihail Gr. - Public Domain
Ramsay Richard Reinagle - Public Domain
Unknown; part of Brady-Handy Photograph Collection. - Public Domain
Nightscream -
unknown - Public Domain
Pieter Christoffel Wonder - Public Domain
Schmid, Renate - CC BY-SA 2.0
Lotsawa108 - CC BY-SA 3.0
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Machahn - Public Domain
Montgelas, Maximilian Joseph, Graf von, 1759-1838
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Ludwig Chronegk
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Holmes, John Haynes - Public Domain
Collyer, Robert, 1823-1912
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Brodziński, Kazimierz, 1791-1835
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Shannon, Molly, 1964-
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Lubovitch, Lar, 1943-
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Alexander, Lamar, 1940-
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NASA - Public Domain
Llewellyn, J. A. (John Anthony)
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Černý, David, 1967-
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Hodierna, Giovanni Battista, 1597-1660
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Public Domain
Smith, George Albert, 1817-1875
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George Albert Smith - Public Domain
Smith, George Albert, 1870-1951
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Ascher, Kenny
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Harte, Betty, 1883-1965
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Katrina Afonso - CC BY-SA 4.0
Donoghue, Emma, 1969-....
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Posluşnicu, Mihail Gr. - Public Domain
Caudella, Eduard, 1841-1924
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Ramsay Richard Reinagle - Public Domain
Nicholls, George, Sir, 1781-1865
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Meeropol, Robert
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Unknown; part of Brady-Handy Photograph Collection. - Public Domain
Garfield, James A. (James Abram), 1831-1881
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Nightscream -
Layton, Bob
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Rude, François, 1784-1855
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Paine, Halbert E.
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Zinsser, Hans, 1878-1940
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unknown - Public Domain
Porter, Jane, 1776-1850
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Woodbury, Joan, 1915-1989
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Pieter Christoffel Wonder - Public Domain
Wonder, Pieter Christoffel, 1780-1852
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Bowie, Jim, 1796?-1836
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Schmid, Renate - CC BY-SA 2.0
Lyons, T. J. (Terry J.), 1953-
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unknown - Public Domain
Royle, Vernon
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Lotsawa108 - CC BY-SA 3.0
Gaffney, Patrick, 1949-