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  1. Results of stream surveys for Harlequin ducks in the Gallatin and a section of the Custer National Forests, Montana / by Darren D. Johnson for Montana Natural Heritage Program.
    By: Johnson, Darren D. - Montana Natural Heritage Program.
    Publication info: Helena, Mont. :Montana Natural Heritage Program,[1991]
    Contributed by: Montana State Library (archive.org)
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