Author
Leverett, Frank
5
Lyell, Charles (1797-1875)
5
Dawson, John William (1820-1899; Sir)
4
Darton, Nelson Horatio 1865-1948
3
Hayden, Ferdinand Vandeveer (1829-1887)
3
Lawson, Andrew C. (1861-1952)
3
Whittlesey, Charles (1808-1886)
3
États-Unis. Army. Corps of engineers
3
Agassiz, Louis 1807-1873
2
Bayley, William Shirley
2
Blanford, William Thomas
2
Blanford, William Thomas (1832-1905)
2
Calkins, Frank C.
2
Clark, William Bullock
2
Commission géologique du Canada
2
Crosby, William O.
2
Dana, James Dwight (1813-1895)
2
Darwin, Charles (1809-1882)
2
Darwin, Charles 1809-1882
2
Etats-Unis. Department of the Interior
2
Geikie, Archibald (1835-1924; Sir)
2
Geological Survey of India
2
Geological survey
2
Grabau, Amadeus W.
2
Hague, Arnold (1840-1917)
2
Hilgard, Eugen Waldemar 1833-1916
2
Iowa Geological Survey
2
Irving, Roland D.
2
Knopf, Adolph
2
Lesquereux, Léo (1806-1889)
2
Lyell, Charles
2
Marcou, Jules (1824-1898)
2
Meek, F. B. (1817-1876)
2
Meulien, Tullia
2
Miller, Hugh
2
Moffit, Fred Howard
2
Murchison, Roderick Impey (1792-1871)
2
Oklahoma Geological Survey
2
Owen, David Dale (1807-1860)
2
Parkinson, John
2
Parks, William Arthur
2
Ransome, Frederick Leslie (1868-1935)
2
Ransome, Frederick Leslie 1868-1935
2
Schrader, Frank C.
2
Sowerby, George Brettingham (1788-1854)
2
Tight, William G.
2
Trask, John B. (1824-1879)
2
Weidman, Samuel
2
Abbe, Cleveland (1872-1934)
1
Adams, Frank D.
1
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