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  1. By: Krabbe, N - Isler, Morton L - Isler, Phyllis R - Whitney, Bret M. - Alonso, J A - Greenfield, Paul J.
    Type: Article
    In: The Wilson bulletin
    Volume: 111
    Issue: 2
    Date: 1999
    Page Range: 157--165
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  2. By: Isler, Morton L - Isler, Phyllis R - Whitney, Bret M. - Zimmer, Kevin J.
    Type: Article
    In: The Wilson journal of ornithology
    Volume: 119
    Issue: 1
    Date: 2007
    Page Range: 53--70
    Publication Info: Lawrence, KS, Wilson Ornithological Society, 2006-
  3. By: Isler, Morton L - Isler, Phyllis R
    Type: Article
    In: Proceedings of the Biological Society of Washington
    Volume: 116
    Date: 2003
    Page Range: 23--28
    Publication Info: Washington, Biological Society of Washington,