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  1. By: Holroyd, G L - Banasch, Ursula
    Type: Article
    In: The journal of raptor research
    Volume: 30
    Issue: 3
    Date: 1996
    Page Range: 145--156
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  2. By: Holroyd, G L - Banasch, Ursula
    Type: Article
    In: The journal of raptor research
    Volume: 37
    Issue: 2
    Date: 2003
    Page Range: 98--116
    Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
  3. By: Banasch, Ursula - Goossen, J. Paul - Riez, Alberto Einstein - Casler, Clark - Barradas, Romeo Dominguez
    Type: Article
    In: The Canadian field-naturalist
    Volume: 106
    Issue: 4
    Date: 1992
    Page Range: 493--498
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  4. 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
  5. By: Holroyd, Geoffrey L - Banasch, Ursula
    Type: Article
    In: The Canadian field-naturalist
    Volume: 104
    Issue: 2
    Date: 1990
    Page Range: 203--208
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  6. By: Schmutz, Josef K. (Josef Konrad), - Fyfe, Richard W. - Banasch, Ursula - Armbruster, Harry
    Type: Article
    In: The Wilson bulletin
    Volume: 103
    Issue: 1
    Date: 1991
    Page Range: 44--58
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-