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  1. By: Gengler, Josef,
    Publication info: Altenburg, H.A. Pierer, 1920
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
  1. By: Gengler, Josef,
    Type: Article
    In: Journal für Ornithologie
    Volume: 62
    Date: 1914
    Page Range: 181--225
    Publication Info: Berlin, Friedländer,