Region
Brandywine Creek Valley (Pa. and Del.)
1
Brandywine Region
1
Brandywine Region (Del.)
1
Christiana Region
1
Christiana Region (Del.)
1
Delaware
2
New York
1
New York (État)
1
New York (N.Y.)
1
New York (State)
1
Pennsylvania
3
Pennsylvanie
1
Philadelphia
3
Philadelphia (Pa.)
2
Philadelphie
1
Potomac River
1
Potomac River Valley
1
United States
2