Author
Historical Society of Pennsylvania
50
Library of Congress
49
United States. Work Projects Administration. Division of Community Service Programs
38
United States. Work Projects Administration. Division of Professional and Service Projects
37
United States. National Archives and Records Service
30
Historical Records Survey (U.S.) Ohio
27
Library of Congress. Manuscript Division
24
Virginia State Library
24
Historical Records Survey (Ohio)
22
McMurtrie, Douglas C. 1888-1944
21
National Archives (U.S.)
20
New Jersey Historical Records Survey Project
20
Library Company of Philadelphia
18
United States. National Archives and Records Administration
18
Historical Records Survey (U.S.)
16
Library of Congress. Division of Bibliography
16
New Hampshire Historical Records Survey
16
Pennsylvania Historical and Museum Commission
16
United States. Works Progress Administration. Division of Women's and Professional Projects
16
Historical Records Survey (U.S.) Pennsylvania
15
Historical Records Survey (U.S.) New Hampshire
14
Historical Records Survey (U.S.) New Jersey
14
Historical Records Survey of Pennsylvania
14
Schweitzer, George Keene, 1924-
14
Griffin, Appleton P. C. 1852-1926
13
US Army Military History Research Collection
13
University of Minnesota. Immigration History Research Center
13
Hasse, Adelaide R. 1868-1953
12
American Philosophical Society
11
Ethnic Heritage Studies Program (U.S.)
11
Free Library of Philadelphia
11
Library of Congress. Map Division
11
New York Public Library
11
Rosenbach, A. S. W. 1876-1952
11
United States. Work Projects Administration. Division of Service Projects
11
Cordasco, Francesco, 1920-
10
Ford, Paul Leicester, 1865-1902
10
University of New Hampshire
10
William L. Clements Library
10
Grolier Club
9
Historical Records Survey (U.S.) New York (State)
9
Pennsylvania Historical and Museum Commission. Division of Archives and Manuscripts
9
United States. National Historical Publications Commission
9
Beers, Henry Putney, 1907-
8
Bibliographical Society of America
8
Boston Public Library
8
Carnegie Institution of Washington. Department of Economics and Sociology
8
Gaer, Joseph, 1897-
8
Gibson, Jeremy Sumner Wycherley
8
Historical Records Survey (U.S.) New York (N.Y.)
8
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