Columbia subject headings:
Fur trade--West (U.S.)
West (U.S.)--Description and travel.
Yellowstone National Park.
Harvard subject headings:
Fur trade--West (U.S.)
West (U.S.)--Description and travel.
Yellowstone National Park.
Princeton subject headings:
Fur trade--West (U.S.).
West (U.S.)--Description and travel.
Yellowstone National Park.