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By "Douglas, David, (1799 - 1834)"
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)
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)