Region
Ohio River Valley
19
Pennsylvania
Ohio, Vallée de l'
3
Northwest, Old
2
Ohio
2
Penn
2
Pennsylvanie
2
United States
2
Westmoreland County (Pa.)
2
Allegheny Mountains
1
Brooke Co
1
États du Moyen-Atlantique (États-Unis)
1
États-Unis
1
Harrison Co
1
Jefferson Co
1
Maryland
1
Middle Atlantic States
1
New England
1
Ohio Co
1
Pittsburgh
1
Virginia
1
Washington Co
1
West Virginia
1