Region
America
2
Delaware
2
Delaware River Valley
2
Delaware River Valley (N.Y.-Del. and N.J.)
2
Delaware, Vallée de la (N.Y.-Del. et N.J.)
1
États-Unis
1
Maryland
3
New Jersey
2
New Sweden
2
Pennsylvania
2
Pennsylvanie
1
Potomac River
1
Sweden
2
United States
3
United States, Maryland
1
United States, Virginia
1
Virginia
1
Western Hemisphere
2