Region
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Great Basin
3
Great Britain
3
Great Plains
8
Illinois
1
Inland Empire (Pacific Northwest)
2
Iowa
3
Italy
1
Japan
3
Kansas
2
Kenya
1
Leadville
1
Louisiana
2
Madison
1
Mexican-American Border Region
3
Mexico
4
Mexico, North
1
Middle East
2
Middle West
5
Mississippi River
2
Mississippi River Valley
11
Missouri
5
Missouri River
12
Missouri River Valley
1
Montana
2
Mormon Pioneer National Historic Trail
3
Mount Rushmore National Memorial (S.D.)
1
Nevada
8
New Mexico
4
New York
3
New York (State)
5
Nord-Ouest canadien
1
Nordamerika
1
Nordwest
1
North America
7
North Dakota
1
Northeastern States
1
Northwest, Canadian
9
Northwest, Old
3
Northwest, Pacific
3
Northwestern United States
1
Oeste (Estados Unidos)
1
Ohio River Valley
2
Oklahoma
1
Omaha (Neb.)
1
Oregon
4
Oregon National Historic Trail
12
Oregon Territory
2
Overland Trails
2
Overland journeys to the Pacific
1
Pacific Coast (U.S.)
2
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