Morwood, William. Traveler in a Vanished Landscape: The Life and Times of David Douglas, Botanical Explorer (New York: Clarkson N. Potter Inc.; London: Gentry Books, 1973).
[See David Douglas entry]
[BCBW 2005] "Forts and Fur" "Science"
[See David Douglas entry]
[BCBW 2005] "Forts and Fur" "Science"