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  1. By: Hofslund, Pershing B
    Type: Article
    In: The Wilson bulletin
    Volume: 76
    Issue: 3
    Date: 1964
    Page Range: 313--320
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  2. By: Hofslund, Pershing B
    Type: Article
    In: The Wilson bulletin
    Volume: 75
    Issue: 3
    Date: 1963
    Page Range: 328--336
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  3. By: Hofslund, Pershing B
    Type: Article
    In: The Wilson bulletin
    Volume: 78
    Issue: 3
    Date: 1966
    Page Range: 332--340
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  4. By: Hofslund, Pershing B
    Type: Article
    In: The Wilson bulletin
    Volume: 77
    Issue: 3
    Date: 1965
    Page Range: 317--324
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-