Other
- Local transit--Pennsylvania--Philadelphia
- Transportation 2 results
- Advertising, Outdoor--United States--History--20th century 1 results
- Floods--Pennsylvania--Johnstown (Cambria County) 1 results
- Law offices--Records and correspondence 1 results
- Local transit--Economic aspects--Pennsylvania--Philadelphia 1 results
- Local transit--Pennsylvania--Philadelphia--History--20th century 1 results
- Philadelphia Rapid Transit Company 1 results
- Philadelphia Rapid Transit Company--History and criticism 1 results
- Photograph albums 1 results
- Photograph albums--1930-1950 1 results
- Photographers--Pennsylvania--Philadelphia 1 results
- Railroads 1 results
- Railroads, Elevated--Pennsylvania--Philadelphia 1 results
- Railroads--Management 1 results
- Subways--Pennsylvania--Philadelphia 1 results
- Transportation--Pennsylvania--20th century 1 results
- Transportation--Pennsylvania--Philadelphia--History 1 results
- Transportation--Pennsylvania--Philadelphia--History—20th century 1 results
- Work environment—Pennsylvania—Philadelphia—History—20th century 1 results