Author
Kalm, Pehr, 1716-1779
8
Baird, Spencer Fullerton, 1823-1887
3
Bartram, William, 1739-1823
2
Forster, Johann Reinhold, 1729-1798
2
Geijerstam, Karl Johan af, 1860-1899
2
Girard, Charles, 1822-1895
2
Haldeman, Samuel Stehman, 1812-1880
2
Hall, James, 1811-1898
2
Lilja, Nils, 1808-1870
2
Stansbury, Howard, 1806-1863
2
Torrey, John, 1796-1873
2
United States. Army. Corps of Topographical Engineers
2
Academy of Natural Sciences of Philadelphia
1
Agassiz
1
American Philosophical Society
1
Audubon, John James, 1785-1851
1
Bartram, John, 1699-1777
1
Benson, Adolph B. 1881-1962
1
Benson, Adolph B. 1881-1962,
1
Burnaby, Andrew, 1732-1812
1
Bye, Joseph P.,
1
Carlborg, Edith Marie Linnéa, 1888-
1
Currá, Thomas M., 1960-
1
Donnelly, James A.
1
Forster, Johann Reinhold, 1729-1798,
1
Forster, Johann Reinhold, 1729-1798, tr
1
Gale, Leonard D. 1800-1883
1
Gallagher, Marsha V.
1
Hendrikson, Kris
1
Henry, Joseph, 1797-1878
1
Herbst, Josephine, 1892-1969
1
Historical Society of Pennsylvania
1
Jeffery, David
1
Library Company of Philadelphia
1
Littlehales, Bates
1
Matkosky, Greg, 1958-
1
Mease, James, 1771-1846
1
Neele, Samuel John, 1758-1824,
1
Orr, William J.
1
Pennsylvania Public Television Network
1
Phillips, John C. 1876-1938
1
Phillips, Maurice E.
1
Phillips, Venia T.
1
Savage, Henry, 1903-
1
Schiedt, Richard Francis Conrad, 1859-
1
Sosko, P. J.
1
T.K. & P.G. Collins (Firm),
1
Tucher, Andie
1
United States. Army. Corps of Engineers
1
United States. War Department
1
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