Library Holdings Catalog – Pennsylvania
- Pennsylvania Statewide
- Adams County
- Allegheny County
- Armstrong County
- Bedford County
- Berks County
- Blair County
- Bucks County
- Butler County
- Cambria County
- Carbon County
- Centre County
- Chester County
- Clarion County
- Clearfield County
- Clinton County
- Columbia County
- Cumberland County
- Dauphin County
- Delaware County
- Fayette County
- Franklin County
- Huntingdon County
- Indiana County
- Jefferson County
- Juniata County
- Lackawanna County
- Lancaster County
- Lehigh County
- Luzerne County
- Mifflin County
- Montgomery County
- Northampton County
- Northumberland County
- Perry County
- Philadelphia County
- Schuylkill County
- Snyder County
- Somerset County
- Union County
- Washington County
- Westmoreland County
- Wyoming County
- York County