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|←Author Index: Do||David Douglas
- Journal kept by David Douglas during his travels in North America 1823-1827: together with a particular description of thirty-three species of American oaks and eighteen species of Pinus, with appendices containing a list of the plants introduced by Douglas and an account of his death in 1834 (1914)
- Oregon Historical Quarterly/Volume 6/Second Journey to the Northwestern Parts of the Continent of North America during the Years 1829-30-31-32-33
- Oregon Historical Quarterly/Volume 6/Number 4
Works about Douglas
- "Douglas, David," in Dictionary of National Biography, 1885-1900, London: Smith, Elder, & Co. (1885-1900) in 63 vols.
- Oregon Historical Quarterly/Volume 5/A Brief Memoir of the Life of Mr. David Douglas, with Extracts from His Letters