Author
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Akin, James, approximately 1773-1846,
2
Albert, Charles H.
1
Alberts, Robert C.
1
Albrecht, Johann, 1745-1806
1
Albrecht, Otto E. 1899-1984
1
Albright, John
1
Alderfer, E. Gordon 1915-1996
2
Alexander, Ashton, 1772-1855
1
Alexander, John K.
1
Alison, Francis, 1705-1779
1
Allardice, S.
5
Allegheny County Sanitary Authority
1
Allegheny National Forest (Agency : U.S.),
1
Alleine, Joseph, 1634-1668
1
Allen, Ethan, 1738-1789
2
Allen, Richard, 1760-1831
1
Allen, Richard, 1760-1831,
1
Alliance for the Chesapeake Bay
1
Allied Jewish Appeal of Philadelphia
1
Allison, Burgiss, 1753-1827
1
Allston, William, 1771-1848
1
Alotta, Robert I.
1
Alpha
1
Alstadt, Donald M.
1
Ameisen, Elizabeth R.
2
America's Industrial Heritage Project
1
American Bar Association. Section of Business Law. Committee on Gaming Law,
1
American Bar Association. Section of Criminal Justice,
1
American Bar Association. Solo, Small Firm and General Practice Division,
1
American Bar Association. Standing Committee on Traffic Court Program,
1
American Catholic Historical Society of Philadelphia
1
American Chemical Society. Division of Nuclear Chemistry and Technology
1
American Chemical Society. Meeting
1
American Circulating Library (Philadelphia, Pa.)
1
American Federation of Labor. Pennsylvania Branch
1
American Flint Glass Manufactory
2
American Geophysical Union
2
American Institute of Architects. Pittsburgh Chapter
1
American Mutoscope and Biograph Company
1
American Philosophical Society
12
Americus Club of Pittsburgh
1
Ames, Alexander Lawrence, 1987-
1
Amicable Fire Company (Philadelphia, Pa.)
1
Amir, Menachem, 1930-
1
Ammon, Richard
2
Amram, David Werner, 1866-1939,
1
An American
1
Anastasia, George
1
Anderson, Elijah
3
Anderson, J. Alton,
1
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