Columbia subject headings:
Frontier and pioneer life--Canada.
Frontier and pioneer life--United States.
Fur trade--Europe.
Fur trade--North America.
Indians of North America.
Trapping.
Harvard subject headings:
Frontier and pioneer life--Canada
Frontier and pioneer life--United States
Fur trade--Europe.
Fur trade--North America.
Indians of North America.
Trapping
Princeton subject headings:
Frontier and pioneer life--Canada.
Frontier and pioneer life--United States.
Fur trade--Europe.
Fur trade--North America.
Indians of North America.
Trapping.