Other
- Advertising, Outdoor--United States--History--20th century 1 results
- Floods--Pennsylvania--Johnstown (Cambria County) 1 results
- Local transit--Pennsylvania--Philadelphia
- Local transit--Pennsylvania--Philadelphia--History--20th century 1 results
- Photograph albums 1 results
- Photograph albums--1930-1950 1 results
- Photographers--Pennsylvania--Philadelphia 1 results
- Transportation--Pennsylvania--Philadelphia--History 1 results
- Transportation--Pennsylvania--Philadelphia--History—20th century
- Work environment—Pennsylvania—Philadelphia—History—20th century 1 results