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Contributor
- McAllister, John A. (John Allister), 1822-18961,882
- George Morris Philips1,837
- Jane Vadnal (contributor)1,621
- University of Pittsburgh1,521
- Pennsylvania. General Assembly. Legislative Reference Bureau1,358
- Pennsylvania. Bureau of Mines.1,165
- University of Pittsburgh at Johnstown1,154
- Philip Maye (contributor)1,132
- Booth, James Curtis, 1810-1888613
- American Sunday-School Union, former owner.578
- Pennsylvania Highlands Community College558
- United States Book and Job Printing Office (Philadelphia, Pa.)492
- Bush-Brown, Louise, 1897-1974486
- Bredig, Georg, 1868-466
- McCormick, Dawn (contributor)466
- Quinto-Pozos, David (contributor)466
- Toth, Paul (contributor)466
- Havell, Robert, 1793-1878. (contributor)430
- Speck, Frank G. (Frank Gouldsmith), 1881-1950 (collector)426
- Pittsburgh City Planning Department425