Author
Family Genealogical Exchange
12
United States. Office of Indian Affairs
12
American Jewish Historical Society
10
New England Historic Genealogical Society
10
Philadelphia Convention & Visitors Bureau
9
American Association of University Women Philadelphia Branch
8
American Historical Association
8
American Association for State and Local History
7
Archaeological Institute of America
7
Archives of American Art
7
Harry Houdini Collection (Library of Congress)
7
Historical Society of Delaware
7
Historical Society of Pennsylvania
7
Historical Society of Western Pennsylvania
7
Kentucky Historical Society
7
Pennsylvania Railroad
7
Presbyterian Historical Society
7
Swiss-American Historical Society
7
American Jewish Congress
6
Augustan Society
6
Friends of Independence National Historical Park
6
Genealogical Society of Pennsylvania
6
Lusaka Mission Service
6
Maryland Historical Society
6
National Trust for Historic Preservation in the United States
6
New Jersey Historical Society
6
Organization of American Historians
6
Pennsylvania Historical and Museum Commission
6
R.L. Polk & Co
6
Reformed Church in the United States
6
Tennessee Historical Society
6
Union of American Hebrew Congregations
6
United States. Continental Congress
6
Vermont Historical Society
6
American Anti-Slavery Society
5
American Antiquarian Society
5
American Gymnastic Union
5
American-Scandinavian Foundation
5
Armenian Assembly of America
5
Armenian General Benevolent Union
5
Atlanta Historical Society
5
B'nai B'rith. Anti-defamation League
5
Balch Institute for Ethnic Studies
5
Balzekas Museum of Lithuanian Culture
5
Center for Migration Studies (U.S.)
5
Chamber of Commerce of Greater Philadelphia
5
Cincinnati Historical Society
5
Clemens, William Montgomery, 1860-1931
5
Collom, William
5
Connecticut Society of Genealogists
5
more ...