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  1. Results of Harlequin duck (Histrionicus histrionicus) surveys in wilderness areas of the Flathead National Forest, Montana / by David N.B. Lee and David L. Genter to the U.S.D.A. Forest Service, Flathead National Forest.
    By: Lee, David N. B. - Genter, David Leon. - Flathead National Forest (Agency : U.S.) - Montana Natural Heritage Program.
    Publication info: Helena, MT :Montana Natural Heritage Program,1991.
    Holding Institution: Montana State Library (archive.org)
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