Region
Pennsylvania
United States
Philadelphia
5
Philadelphia (Pa.)
4
Delaware River Valley
3
Delaware River Valley (N.Y.-Del. and N.J.)
3
New Jersey
2
Pennsylvanie
2
Philadelphie
2
Altoona
1
Altoona (Pa.)
1
Bethlehem Steel Company
1
Delaware, Vallée de la (N.Y.-Del. et N.J.)
1
Elkins Park
1
États-Unis
1
Penn
1