Columbia subject headings:
Frontier and pioneer life--West (U.S.)
Fur trade--West (U.S.)--History.
Indians of North America--West (U.S.)
West (U.S.)--History--To 1848.
Harvard subject headings:
Frontier and pioneer life--West (U.S.)
Fur trade--West (U.S.)--History.
Indians of North America--West (U.S.)
West (U.S.)--History--To 1848.
Princeton subject headings:
Frontier and pioneer life--West (U.S.)
Fur trade--West (U.S.)--History--19th century.
Indians of North America--West (U.S.)
West (U.S.)--History--To 1848.