Author
Historical Society of Pennsylvania
13
Library of Congress
11
United States. National Archives and Records Administration
11
National Archives (U.S.)
8
United States. Work Projects Administration. Division of Community Service Programs
8
Library Company of Philadelphia
7
Beers, Henry Putney, 1907-
5
Hasse, Adelaide R. 1868-1953
5
Schweitzer, George Keene, 1924-
5
Survey of Federal Archives (U.S.) Pennsylvania
5
Bowker, R. R. 1848-1933
4
Cordasco, Francesco, 1920-
4
Filby, P. William 1911-2002
4
Ford, Paul Leicester, 1865-1902
4
Historical Records Survey of Pennsylvania
4
Kirkham, E. Kay
4
Steiger, Ernst, 1832-1917
4
Tompkins, Dorothy C. 1908-1988
4
United States. National Archives and Records Service
4
Balch Institute for Ethnic Studies
3
Carnegie Institution of Washington. Department of Economics and Sociology
3
Denver Public Library
3
Durrie, Daniel S. 1819-1892
3
Jenkins, William Sumner, 1902-
3
Kaminkow, Marion J.
3
Library of Congress. General Reference and Bibliography Division
3
Library of Congress. Geography and Map Division
3
Library of Congress. Manuscript Division
3
Library of Congress. Map Division
3
Malikoff, Gabrielle Ernits, 1896-
3
Matchette, Teresa F.
3
Meynen, Emil, 1902-1994
3
Miller, Wayne Charles
3
Moebs, Thomas Truxtun
3
New Jersey Historical Records Survey Project
3
Peterson, Clarence Stewart, 1896-1968
3
Scotch-Irish Foundation
3
State Historical Society of Wisconsin
3
United States. Superintendent of Documents
3
United States. Work Projects Administration. Division of Professional and Service Projects
3
University of California, Berkeley. Institute of Governmental Studies
3
West, Earle H.
3
Allison, William Henry, 1870-1941
2
American Council of Learned Societies
2
American Historical Association
2
American Library Association
2
Atlantis, Inc
2
Bonnemains, Jacqueline
2
Boston Athenaeum
2
Bowers, Douglas
2
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