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Rudolf Dührkoop - Public Domain
Elya - CC BY-SA 4.0
unknown - Public Domain
Pymouss - CC BY-SA 3.0
Internet Archive Book Images -
Giuseppe Fagnani - Public Domain
Sir Patrick Geddes, by Lafayette (Lafayette Ltd) half-plate nitrate negative, 30 December 1931 - CC BY-SA 3.0
Brian Ashley White - CC BY-SA 2.0
:fr:Studio Harcourt - CC BY 3.0
George L. Cobb - CC BY-SA 4.0
Contemporary photograph - Public Domain
Oregon State University -
Engraving by Gimber and Dick after painting by artist identified as "Sloan" - Public Domain
Radcliffe Kelso - CC BY-SA 4.0
Editors: Cathy Tillack and Karen Still - Public Domain
F Ceragioli - CC BY-SA 3.0
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Watterston, George, 1783-1854
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McCartney, Stella, 1971-
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Glendenin, Lawrence E. (Lawrence Elgin), 1918-2008
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Rudolf Dührkoop - Public Domain
Fall, Leo, 1873-1925
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Elya - CC BY-SA 4.0
Böhm, G. (Gottfried), 1920-....
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unknown - Public Domain
Margareta, Crown Princess of Sweden, 1882-1920
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Oriani, Barnaba, 1752-1832
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Pymouss - CC BY-SA 3.0
Peyrac, Nicolas, 1949-
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Folks, Homer, 1867-1963
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Internet Archive Book Images -
Stacy-Judd, Robert
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Giuseppe Fagnani - Public Domain
Church, Philip Schuyler, 1778-1861
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Sir Patrick Geddes, by Lafayette (Lafayette Ltd) half-plate nitrate negative, 30 December 1931 - CC BY-SA 3.0
Geddes, Patrick, Sir, 1854-1932
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Brian Ashley White - CC BY-SA 2.0
Nitzsche, Jack
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Richards, Brinley, 1819-1885
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:fr:Studio Harcourt - CC BY 3.0
Berry, Richard, 1950-....
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Colt, Le Baron Bradford, 1846-1924
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Strathcona and Mount Royal, Donald Alexander Smith, baron, 1820-1914
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George L. Cobb - CC BY-SA 4.0
Cobb, George L., 1886-1942
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Contemporary photograph - Public Domain
Bavinck, Herman, 1854-1921
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Oregon State University -
Sprague, Charles A. (Charles Arthur), 1887-1969
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Smith, C. R. (Cyrus Rowlett), 1899-
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Eisenberger, Severin, 1879-1945
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Engraving by Gimber and Dick after painting by artist identified as "Sloan" - Public Domain
Morrell, Benjamin, 1795-1839
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Radcliffe Kelso - CC BY-SA 4.0
McCutcheon, John, 1952-
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Heinrichs, Erik, 1890-1965
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Brunon (św. ; ca 1030-1101).
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Editors: Cathy Tillack and Karen Still - Public Domain
Tanner, N. Eldon (Nathan Eldon), 1898-1982
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Smith, Robert, 1757-1842
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F Ceragioli - CC BY-SA 3.0
Galliari, Bernardino, 1707-1794
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Oda, Nobunaga, 1534-1582