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unknown - Public Domain
Ferdinand Mulnier. Upload, stitch and restoration by Jebulon - Public Domain
1881 Paris Electrical Exposition - Public Domain
Flickr account - CC BY 2.0
Soppakanuuna - CC BY-SA 3.0
Matthew Wedgwood - CC BY-SA 2.0
USN - Public Domain
Kate Lundy (https://www.flickr.com/people/lundyk/) - CC BY 2.0
Public Domain
Alan Light - CC BY 2.0
Charles-Louis Bazin - Public Domain
Tim Mackrell -
unknown -
Mary Arzumanyan - CC BY-SA 4.0
Brady-Handy Photograph Collection (Library of Congress) - Public Domain
Garitan - CC BY-SA 3.0
puzzlemaster - CC BY 2.0
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unknown - Public Domain
Gilbert, Rosa M. (Rosa Mulholland), 1841-1921
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Ferdinand Mulnier. Upload, stitch and restoration by Jebulon - Public Domain
Protais, Alexandre 1826-1890
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1881 Paris Electrical Exposition - Public Domain
Hammer, William Joseph, 1858-1934
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El-Dabh, Halim, 1921-....
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Flickr account - CC BY 2.0
Sozzani, Franca.
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Soppakanuuna - CC BY-SA 3.0
Bagh, Peter von, 1943-
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Matthew Wedgwood - CC BY-SA 2.0
Root, Stephen
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USN - Public Domain
Tolley, Kemp, 1908-
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Eddy, Arthur Jerome, 1859-1920
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Kate Lundy (https://www.flickr.com/people/lundyk/) - CC BY 2.0
Snowdon, Warren, 1950-
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Public Domain
Segato, Girolamo, 1792-1836
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Kopf, Hinrich Wilhelm 1893-1961
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Alan Light - CC BY 2.0
Haley, Jack, Jr., 1933-2001
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George I, King of the Hellenes, 1845-1913
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Heidenstam, Verner von 1859-1940
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Margaret, of Austria, Duchess of Parma, 1522-1586
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Porter, Endymion, 1587-1649
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Charles-Louis Bazin - Public Domain
Panseron, Auguste-Mathieu, 1795-1859
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Varley, John, 1778-1842
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Tim Mackrell -
Green, R. C. (Roger Curtis)
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unknown -
Chantemesse, André, 1851-1919
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unknown - Public Domain
Chevrolet, Louis, 1878-1941
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Griswold, Francis H. (Francis Hopkins), 1904-1989
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Mary Arzumanyan - CC BY-SA 4.0
Kouymjian, Dickran
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Owen, Hugh, 1804-1881
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Tyler, Wat, -1381
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Brady-Handy Photograph Collection (Library of Congress) - Public Domain
Perry, Nehemiah, 1816-
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unknown - Public Domain
Hausmann, Robert, 1852-1909
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Garitan - CC BY-SA 3.0
Fournel, Paul, 1947-....
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puzzlemaster - CC BY 2.0
Wulsin, Janet E. 1894-1963