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