Columbia subject headings:
Harvard subject headings:
Fur trade--Missouri River Valley--History--19th century.
Fur trade--West (U.S.)--History--19th century.
Fur traders--Missouri River Valley--Biography.
Missouri River Valley--Biography.
Provost, Etienne, 1785-1850.
Princeton subject headings:
Fur trade--West (U.S.)
Fur trade--West (U.S.).
Provost, Etienne, 1785-1850.
West (U.S.)--Description and travel.