Author
21st Pennsylvania Cavalry Association
1
AIDS Information Network (Philadelphia, Pa.)
1
Abington (Montgomery County, Pa. : Township) Public Library
1
Adoption Forum of Philadelphia
2
Afternoons With Science (Club)
1
Afternoons with Science (Club)
1
Agricultural College of Pennsylvania
1
Aitken, Robert, 1735-1802
1
Albrecht, Anton, 1781-
2
Albrecht, William, 1793-
2
Alleghany Railroad and Coal Company
1
Allegheny County Bar Association
1
Allegheny Portage Railroad Company
3
Allegheny Valley Railroad Company
1
Allegheny Valley Railway Company
1
Allen, Clifford P. 1841-
1
Allen, William H.
1
Allentown Art Museum
1
Alpha Portland Cement Co
1
Alpha Portland Cement Co. (Easton Pa.),
1
American Almanac Collection (Library of Congress)
30
American Finnish Society of the Delaware Valley
2
American Imprint Collection (Library of Congress)
2
American Institute of Architects. Philadelphia Chapter
1
American Society for Visiting Catholic Prisoners
1
American Tract Society
1
American Tract Society (Philadelphia)
1
American Tract Society. Pennsylvania Branch
2
Andalusia College (Bucks County, Pa.)
2
Andrews, William
1
Anthracite Board of Conciliation
1
Armstrong Associatio of Philadelphia
1
Armstrong Association of Philadelphia
3
Art-Union of Philadelphia
1
Arthur, T. S.
1
Artisans Order of Mutual Protection
1
Artists Equity Association, Inc Philadelphia Chapter
1
Arts Alliance of Bucks County
1
Ashton, D. R.
1
Assistance Fire Company (Philadelphia)
1
Association of Friends, for the Free Instruction of Adult Colored Persons (Philadelphia)
1
Automobile Club of Philadelphia
1
Awbury Arboretum Association
1
Bailey, Banks & Biddle Company (Philadelphia, Pa.)
1
Baker, Jesse M.
1
Bald Eagle and Spring Creek Navigation Company
1
Baltimore and Susquehanna Railroad Co
1
Barclay Home (West Chester, Pa.)
1
Bateman, Thomas H.
1
Bär, Johann, 1795-1858
2
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