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  1. By: Lopez-Ornat, Arturo - Ramo, Cristina
    Type: Article
    In: The Wilson bulletin
    Volume: 104
    Issue: 3
    Date: 1992
    Page Range: 501--515
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  2. By: Ramo, Cristina - Busto, Benjamín
    Type: Article
    In: The Wilson bulletin
    Volume: 105
    Issue: 4
    Date: 1993
    Page Range: 573--586
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-