Columbia subject headings:
Harvard subject headings:
Canada, Western--Description and travel.
Cartographers--Canada--Biography.
Explorers--Canada--Biography
Fur traders--Canada--Biography.
Hudson's Bay Company--History.
North West Company--History.
Northwest, Canadian--Description and travel.
Northwest, Pacific--Description and travel.
Pioneers--Canada--Biography.
Surveyors--Canada--Biography.
Thompson, David, 1770-1857--Travel--Canada, Western.
Thompson, David, 1770-1857--Travel--Northwest, Pacific.
Princeton subject headings:
Canada, Western--Description and travel.
Cartographers--Canada--Biography.
Explorers--Canada--Biography.
Fur traders--Canada--Biography.
Hudson's Bay Company--History.
North West Company--History.
Northwest, Pacific--Description and travel.
Pioneers--Canada--Biography.
Thompson, David, 1770-1857--Travel--Canada, Western.
Thompson, David, 1770-1857--Travel--Northwest, Pacific.