Einfach, aber großartig : die Dampfloks der Reihe K4s der Pennsylvania Railroad
The railroad that never was : Vanderbilt, Morgan, and the South Pennsylvania Railroad
Railroads of Pennsylvania : your guide to Pennsylvania's historic trains and railway sites
Mein lieber Bruder oder Schwester!
Mein lieber Bruder oder Schwester!
Failure rates and data driven policies for vehicle safety inspections in Pennsylvania
The Ma & Pa : a history of the Maryland & Pennsylvania Railroad
Grove City, Pennsylvania, ADAP Request No. 71-1-7-42-0035