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Contributor
- McAllister, John A. (John Allister), 1822-18961,888
- George Morris Philips1,837
- Pennsylvania. General Assembly. Legislative Reference Bureau1,358
- Jefferson - East Falls1,340
- Pennsylvania. Bureau of Mines.1,165
- American Sunday-School Union, former owner.578
- United States Book and Job Printing Office (Philadelphia, Pa.)491
- Speck, Frank G. (Frank Gouldsmith), 1881-1950 (collector)426
- Le Caron, Pierre, active 1488-approximately 1500308
- Special Libraries Association Pittsburgh Chapter.280
- Foulke, William Parker, 1816-1865 (Creator)258
- King & Baird254
- Richland Township Fire Company235
- Woodville, William, 1752-1805210
- International Union of Mine, Mill, and Smelter Workers205
- Mewar, House of203
- Thorne, Frederick R. (photographer)203
- Foulke, William Parker, 1816-1865 (Correspondent)188
- Curt Teich Co.154
- Consolidation Coal Company149