- EbookBessemer and Lake Erie RailroadKenneth C. Springirth
- EbookNorthwestern Pennsylvania RailroadsKenneth C. Springirth
- EbookPittsburgh Streamlined TrolleysKenneth C. Springirth
- EbookSuburban Philadelphia TrolleysKenneth C. Springirth
- EbookEast Broad Top RailroadKenneth C. Springirth
- EbookJohnstown Trolleys and InclineKenneth C. Springirth
- EbookArcade and Attica RailroadKenneth C. Springirth
- EbookSoutheastern Pennsylvania TrolleysKenneth C. Springirth
- EbookGreater Erie TrolleysKenneth C. Springirth