Fueling the Gilded Age : railroads, miners, and disorder in Pennsylvania coal country
Conquering Gotham : a gilded age epic ; the construction of Penn Station and its tunnels
National Airspace System: Status of FAA's Standard Terminal Automation Replacement System
The Pennsylvania Railroad at bay : William Riley McKeen and the Terre Haute & Indianapolis Railroad
Ships for the seven seas : Philadelphia shipbuilding in the age of industrial capitalism
Delaware, Lackawanna and Western Railroad Line Scranton to Slateford Junction, Pennsylvania
Appraisal of Digital Terrain Elevation Data for Low-Altitude Flight