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Thomas W. Jefferson - CC BY-SA 3.0
Giulia Forsythe - CC BY-SA 2.0
unknown - Public Domain
Slowking4 -
Kristian Brasen - CC BY-SA 3.0
"The Railway World" magazine. - Public Domain
Hell&Fischer Philadelphia - Public Domain
screen shots or promotional photo - Public Domain
Edward McCluney, Cambridge, Massachusetts, USA - CC BY-SA 3.0
IAEA Imagebank -
Darko.veberic - CC BY-SA 3.0
Martin Bernigeroth (1670-1733) - Public Domain
Georges Biard - CC BY-SA 3.0
23artashes - CC BY-SA 3.0
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Thomas W. Jefferson - CC BY-SA 3.0
Beck, Franz Ignaz, 1734-1809
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Maguire, James Rochfort, 1855-1925
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Samaroff, Olga
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Fox, Wilson, 1831-1887
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Holland, Dave, 1946-....
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Hindenburg, Paul von 1847-1934
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Bailey, Gamaliel, 1807-1859
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Giulia Forsythe - CC BY-SA 2.0
Hay, Elizabeth, 1951-
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unknown - Public Domain
Rains, Gabriel James, 1803-1881
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Vestal, Albert H. (Albert Henry), 1875-1932
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Slowking4 -
Bourgeois, Roy, 1938-....
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Hallyday, David
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Boyer, Myriam
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Kristian Brasen - CC BY-SA 3.0
Clausen, Erik, 1942-....
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"The Railway World" magazine. - Public Domain
Post, George A. (George Adams), 1854-1925
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Daumer, Georg Friedrich, 1800-1875
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Hell&Fischer Philadelphia - Public Domain
Mendenhall, Thomas C. (Thomas Corwin), 1841-1924
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Correggio, 1489?-1534
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screen shots or promotional photo - Public Domain
Oliver, Harry, 1888-1973
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Morris, Cadwalader, 1741-1795
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Edward McCluney, Cambridge, Massachusetts, USA - CC BY-SA 3.0
Williams, James H.
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IAEA Imagebank -
Khoman, Thanat
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Sigerist, Henry E. (Henry Ernest), 1891-1957
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Darko.veberic - CC BY-SA 3.0
Watson, Alan Andrew
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Martin Bernigeroth (1670-1733) - Public Domain
Börner, Christian Friedrich, 1683-1753
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Schubart, Christian Friedrich Daniel, 1739-1791
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unknown - Public Domain
Chapman, George Henry, 1832-1882
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Georges Biard - CC BY-SA 3.0
Watson, Emma, 1990-....
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23artashes - CC BY-SA 3.0
Libaridian, Gerard J.
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Britten, James, 1846-1924