Author
Stapleton, Darwin H.
7
Rogers, Henry D. 1808-1866
6
Darwin, Charles, 1809-1882
4
Rogers, Henry Darwin, 1808-1866
4
Geological Survey of Pennsylvania
2
Greene, Norman Joy
2
Král, Josef Jiří, 1870-
2
Latrobe, Benjamin Henry, 1764-1820
2
Maryland Historical Society
2
New Jersey Geological Survey
2
Pannekoek, Anton, 1873-1960
2
Seward, Anna, 1742-1809
2
Toomer, Jean, 1894-1967
2
Agricultural History Society
1
American Philosophical Society Friends of the Library
1
American Philosophical Society. Library
1
Amphibole
1
Archives of Czechs and Slovaks Abroad
1
Ashworth, William B.
1
Association of American Geologists and Naturalists
1
Aughton, Peter, 1940-
1
Axtell, Silas Blake, 1885-
1
Bohemian Brethren
1
British Association for the Advancement of Science Meeting
1
British and Foreign Bible Society
1
Cambridge Philosophical Society
1
Cambridge University Press
1
Coates, Crawford
1
Cope, Edward D.
1
Darwin, Charles, 1809-1882,
1
Darwin, M. F.
1
Delaware, Lackawanna and Western Railroad Company
1
Dorst, John Darwin
1
Eccritean Society
1
Erodelphian Society
1
Force, M. F. 1824-1899
1
Formwalt, Lee W.
1
Frazer, Persifor, 1844-1909
1
Freeman family
1
Frost family
1
Fryer, John 1937-2003
1
Gallup Family Association
1
Gallup, Darwin C. 1914-
1
Glad, John
1
Hall, Charles Edward, 1852-1908
1
Hills, O. A. 1837-1919
1
Hughes, D. D. 1823-1883
1
Hughes, W. H. 1858-
1
Kalb, Claudia
1
Kelsey, Darwin P.
1
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