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  1. By: Rotzell, W. E. (Willett Enos),
    Publication info: Narberth, Pa, W.E. Rotzell, 1903-1904
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
  2. By: Rotzell, W. E. (Willett Enos),
    Publication info: n.p, 1895
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
  1. By: Rotzell, W. E. (Willett Enos),
    Type: Article
    In: The Wilson bulletin
    Volume: 14
    Series: new
    Issue: 1
    Date: 1902
    Page Range: 20--20
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-