Other
Built environment--Pennsylvania--Philadelphia--20th century
1
Labor--Images--20th century
2
Law offices--Records and correspondence
1
Local transit--Pennsylvania--Philadelphia
1
Philadelphia views--Street scenes--20th century
1
Photography--Philadelphia street scenes--20th century
1
Railroads
1
Railroads--Construction--Philadelphia
1
Railroads--Management
1
Street railroads--Pennsylvania
1
Subways--Philadelphia
2
Transportation
1
Transportation--Images
1