Columbia subject headings:
Harvard subject headings:
Canada, Western--History--19th century.
Fur trade--Canada, Western--History--19th century.
Fur trade--Canada--History
Hudson's Bay Company--History--19th century.
Hudson's Bay Company--History.
North West Company--History--19th century.
North West Company--History.
Northwest, Canadian--History.
Princeton subject headings:
Canada, Western--History--19th century.
Fur trade--Canada, Western--History--19th century.
Hudson's Bay Company--History--19th century.
North West Company--History--19th century.