Author
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Penn Dept. of Environmental Resources
1
Petraglia, M. D.
1
Philadelphia Botanical Club
1
Reese, Charles Lee, 1903-
1
Richards, Robert Haven, 1873-1951
1
Rodney, Richard S. 1882-1963
1
Scholl, Michael D.
1
Scott, Kenneth
1
Silber, Barbara Hsiao
1
Southern Baptist Convention. Historical Commission
1
Spruance, William Corbit, 1873-1935
1
Stryker-Rodda, Kenn
1
Sweeney, John A. H.
1
Thomas Balch Collection
1
Tinsman, Rebecca
1
Tyler, David Budlong, 1899-1993
1
U.S Board of Engineers for Rivers and Harbors
1
U.S Federal Highway Administration
5
U.S Shipping Board
1
U.S Work Projects Administration Division of Community and Service Programs
1
United States. Federal Highway Administration
1
Wallace, Benjamin J.
1
Weslager, C. A. 1909-1994
1
Williams, Thomas, 1797-
1
Wolcott, Josiah Oliver, 1877-1938
1