Subject
Northwestern States Description and travel
Indians of North America
6
West (U.S.) Description and travel
6
Overland journeys to the Pacific
4
Fur trade
3
Northwest, Canadian Description and travel
3
Astoria (Or.)
2
Frontier and pioneer life
2
Mississippi River Valley Description and travel
2
Oregon Description and travel
2
Alaska Description and travel
1
Bighorn Mountains (Wyo. and Mont.)
1
Bighorn River Valley (Wyo. and Mont.)
1
Botany
1
Crow Indians
1
Hunting
1
Indians of North America Missions
1
Minnesota Description and travel
1
Missions
1
Mississippi River Description and travel
1
Natural history
1
Northwest, Old Description and travel
1
Northwestern States History
1
Ohio River Valley Description and travel
1
Oregon National Historic Trail
1
Pacific railroads Explorations and surveys
1
Paleontology
1
Roads
1
Saint Louis (Mo.) History
1
Siksika Indians
1
Southwest, Old Description and travel
1
United States Discovery and exploration
1
Yellowstone River
1