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  1. By: Barber, John C.
    Publication info: [Washington, D.C.?], U.S. Dept. of Agriculture, Forest Service, [1989]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  1. By: Barber, John C.
    Type: Article
    In: Raptor research
    Volume: 13
    Issue: 1
    Date: 1979
    Page Range: 16--16
    Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]
  2. By: Steadman, David W. - Olson, Storrs L. - Barber, John C. - Meister, C A - Melville, M E
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 100
    Date: 1980
    Page Range: 155--158
    Publication Info: London, British Ornithologists' Club, 1893-