Columbia subject headings:
Harvard subject headings:
Botanists--Scotland--Biography.
Botany--Canada--History--19th century--Sources.
Botany--Northwest, Pacific--History--19th century--Sources.
Canada--Description and travel.
Douglas, David, 1799-1834.
Northwest, Pacific--Description and travel.
Scientific expeditions--Canada--History--19th century--Sources.
Scientific expeditions--Northwest, Pacific--History--19th century--Sources.
Princeton subject headings:
Botanists--Scotland--Biography.
Botany--Canada--History--19th century--Sources.
Botany--Northwest, Pacific--History--19th century--Sources.
Canada--Description and travel.
Douglas, David, 1798-1834.
Northwest, Pacific--Description and travel.
Scientific expeditions--Canada--History--19th century--Sources.
Scientific expeditions--Northwest, Pacific--History--19th century--Sources.