Author
"Old Northwest" Genealogical Society
1
250th York County Planning Commission (York, Pa.)
1
ABC-Clio Information Services
2
Aalborg universitetscenter. Danske udvandrerarkiv
1
Abbatt, William
1
Abbatt, William, 1851-1935
2
Abraham, James Johnston, 1876-1
1
Academy of Natural Sciences of Philadelphia
4
Adolphus, Lalit
1
Afro-American Historical Association of the Niagara Frontier
2
Afro-American Historical and Genealogical Society (Washington, D.C.)
3
Agricultural History Society
1
Albemarle County Historical Society (Va.)
1
Albert Einstein College of Medicine
1
Alexander, Edward P. 1907-
1
Allaben, Frank
1
Alvord, Clarence Walworth, 1868-1928
1
American Anti-Slavery Society
1
American Antiquarian Society
1
American Antiquarian Society. Program in the History of the Book in American Culture
1
American Association for State and Local History
3
American Bibliographical Center
6
American Catholic Historical Society of Philadelphia
2
American Catholic Historical Society of Philadelphia (Publisher)
1
American Catholic Historical Society of Philadelphia, pub
1
American Chemical Society
1
American Clock & Watch Foundation
1
American Council for Polish Culture
1
American Council of Polish Cultural Clubs
2
American Heritage Society
2
American Historical Association
6
American Historical Association. Conference Group for Central European History
1
American Historical Co., Inc. (New York)
1
American Historical Company, Inc. (N.Y.)
1
American Institute of Chemical Engineers
1
American Italian Historical Association
2
American Italian Historical Association Long Island Regional Chapter (N.Y.)
1
American Italian Historical Association Maryland-Washington, D.C. Chapter
1
American Italian Historical Association Western Regional Chapter
1
American Jewish Historical Society
10
American Jewish Tercentenary Committee
1
American Jewish historical Soceity
1
American Latvian Association in the United States
2
American Museum of Natural History
1
American Park Network (Firm)
1
American Scenic and Historic Preservation Society
1
American Society of Architectural Historians
2
American Society of Naturalists
1
American Swedish Historical Foundation
2
American Swedish Historical Museum (Philadelphia, Pa.)
2
more ...