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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 h
By: Douglas, David, - Royal Horticultural Society (Great Britain)

Publication info: London :W. Wesley & Son,1914.

Contributed by: University of California Libraries (archive.org)
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Observations on some species of the genera Tetrao and Ortyx, natives of North America with descriptions of four new species of the former, and two of the latter genus / by David Douglas.
By: Douglas, David,

Publication info: S.l. :s.n.,1828?

Contributed by: Canadiana.org (archive.org)
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