14 records – page 1 of 2.
The beginnings of the petroleum industry, sources and bibliography
A checklist of Pennsylvania newspapers
County government and archives in Pennsylvania
Inventory of the county archives of Pennsylvania: Lehigh County
A partial bibliography of the archaeology of Pennsylvania and adjacent ...
Pennsylvania history and morale
Pennsylvania's first year at war, December 7, 1941-December 7, 1942
Remember William Penn, 1644-1944
Some Pennsylvania leaders