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  1. Harlequin duck (Histrionicus histrionicus) conservation assessment and strategy for the U.S. Rocky Mountains / E. Frances Cassirer ... [et al.].
    By: Atkinson, Eric. - Cassirer, Frances. - Reichel, James D. - Wallen, Richard L. - Grand Teton National Park (Agency : U.S.) - Hawk Mountain Sanctuary Association. - Montana Natural Heritage Program. - Nongame and Endangered Wildlife Program (Idaho)
    Publication info: Helena, Mont :Montana Natural Heritage Program,1996
    Contributed by: Montana State Library (archive.org)
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