Columbia subject headings:
Harvard subject headings:
Frontier and pioneer life--West (U.S.)
Indians of North America--West (U.S.)
Oregon National Historic Trail.
West (U.S.)--Description and travel.
Princeton subject headings:
Frontier and pioneer life--West (U.S.)
Indians of North America--West (U.S.)
Oregon National Historic Trail.
Parkman, Francis, 1823-1893--Travel--West (U.S.).
West (U.S.)--Description and travel.