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  1. By: Engel, Kathleen A. - Young, Leonard S.‏ ‎ (Leonard Stephen) - Steenhof, Karen - Roppe, Jerry A - Kochert, Michael N. (Michael Nicholas)
    Type: Article
    In: The Wilson bulletin
    Volume: 104
    Issue: 1
    Date: 1992
    Page Range: 105--121
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-