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  1. 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)
    Subjects: Birds  Grouse  Rocky Mountains region  Tetraonidae  
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