Author
Pennsylvania. Department of Forests and Waters
37
Knull, Josef Nissley, 1891-1975
34
Smithsonian Institution
5
American Historical Association
3
Aston, Edward R.
3
Knull, Josef Nissley, 1891-
3
Pennsylvania Game Commission
3
Pennsylvania. Bureau of Industrial Hygiene
3
Duckworth, W. Donald
2
Federal Deposit Insurance Corporation
2
Kosack, Joe
2
Obraztsov, Nikolaus S., 1906-1966
2
Pennsylvania. Department of Commerce
2
Stranahan, Susan Q.
2
United States. Bureau of the Census
2
Admiraal, David
1
Ambler, Charles Henry, 1876-1957
1
Andrews, Edward M.
1
Arnett, Ross H.
1
Banner, Albert H.
1
Barnhart, John Hendley, 1871-1949
1
Bayard, James A. (James Asheton), 1767-1815
1
Benedict, Francis Gano, 1870-1957
1
Bomberger, Paul
1
Bugbee, Robert E.
1
Campi, John S.
1
Capps, Hahn William, 1903-
1
Chase, Salmon P. (Salmon Portland), 1808-1873
1
Clapp, Roger B.
1
Clarke, J. F. Gates (John Frederick Gates), 1905-1990
1
Clarke, John Mason, 1857-1925
1
Clinton, George Perkins, 1867-1937
1
Cobb, Howell, 1815-1868
1
Crew, Henry, 1859-1953
1
Davis, Bergen, 1869-
1
Denison, George S. (George Stanton), 1833-1866
1
Discussional on Occupational Health
1
Dobson, Samuel H.
1
Donnan, Elizabeth, 1883-1955
1
Douglass, A. E. (Andrew Ellicott), 1867-1962
1
Durand, William Frederick, 1859-1958
1
East, Edward Murray, 1878-
1
Elbel, Robert Edwin, 1925-
1
Environmental Management Technical Center (U.S.)
1
Field, William D., 1914-1992
1
Flint, Oliver S.
1
Geological Survey (U.S.)
1
Gordon, Alison D.
1
Gregory, William K. (William King), 1876-1970
1
Harper, Robert Goodloe, 1765-1825
1
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