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  1. By: Fyfe, Richard W. - Banasch, Ursula - Benavides, Virgilio - de Benavides, Nancy Hilgert - Luscombe, Anthony - Sánchez, Julio E.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 104
    Issue: 2
    Date: 1990
    Page Range: 285--292
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  2. By: Sandoval, Luis - Sanchez, Cesar - Biamonte, Esteban - Zook, James R. - Sánchez, Julio E. - Martinez, Daniel - Loth, Daryl
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 130
    Date: 2010
    Page Range: 237--245
    Publication Info: London, British Ornithologists' Club, 1893-