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  1. By: Hayward, C Lynn - Cottam, Clarence, - Woodbury, Angus M. (Angus Munn), - Frost, Herbert H. - Porter, Richard - Erwin, Robert J
    Type: Article
    In: Great Basin naturalist memoirs
    Volume: 1
    Date: 1976
    Page Range: 1--229
    Publication Info: [Provo, Utah], Brigham Young University, 1976-1992
  2. By: Schodde, Richard - Kirwan, Guy M - Porter, Richard
    Type: Article
    In: Bulletin of the British Ornithologists' Club
    Volume: 132
    Issue: 4
    Date: 2012
    Page Range: 283--294
    Publication Info: London, British Ornithologists' Club, 1893-
  3. By: Marr, Tony - Newell, Dick - Porter, Richard
    Type: Article
    In: Bulletin of the African Bird Club
    Volume: 5
    Issue: 1
    Date: 1998-03
    Page Range: 22--29
    Publication Info: Cambridge, African Bird Club, 1994-
  4. By: Salim, Mudhafar - Porter, Richard - Rubec, Clayton
    Type: Article
    In: BioRisk
    Volume: 3
    Date: 2009
    Page Range: 205-219
    Publication Info: Pensoft Publishers 2009