Region
West (U.S.)
22
Columbia River
14
Missouri River
14
North America
7
United States
7
The West
6
West United States
5
États-Unis (Ouest)
4
États-Unis
3
USA
3
Columbia (Fleuve)
2
Missouri (Rivière)
2
Ohio River Valley
2
Philadelphia (Pa.)
2
Allegheny River Valley (Pa. and N.Y.)
1
Amâerique du Nord
1
Brooke Co
1
Canada
1
Great Plains
1
Lewis and Clark National Historic Trail
1
Louisiana
1
Mississippi River
1
Mississippi River Valley
1
Missouri
1
Monongahela River Valley (W. Va. and Pa.)
1
Nordamerika
1
Northwest, Pacific
1
Ohio River
1
Pennsylvania
1
Philadelphia
1
The West (U.S.)
1
Wellsburg
1
West Indies
1
West Virginia
1
âEtats-Unis
1