Attitudes, Perceptions, and Constraints on Travel
Transportation Innovation and Changing Spatial Patterns: Pittsburgh, 1850-1910
Pennsylvania. Airport Project at Shamokin. Northumberland County
Center City Transportation Project - Pittsburgh
Defense Use of Certain Federal Property: Philadelphia Area, Navy
Historic Resource Study - Allegheny Portage Railroad National Historic Site, Pennsylvania
Status Report: Mass Transportation and Highway Planning
University Park Airport, State College, Pennsylvania
University Park Airport, State College, Pennsylvania