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  1. By: Sonntag, C F
    Type: Article
    In: Proceedings of the Zoological Society of London
    Volume: 1920
    Issue: 1-2
    Date: 1920-07
    Page Range: 169--174
    Publication Info: London Academic Press, [etc.] 1833-1965
  2. By: Sonntag, C F
    Type: Article
    In: Proceedings of the Zoological Society of London
    Volume: 1920
    Issue: 1-2
    Date: 1920-07
    Page Range: 175--177
    Publication Info: London Academic Press, [etc.] 1833-1965
  3. By: Sonntag, C F
    Type: Article
    In: Proceedings of the Zoological Society of London
    Volume: 1920
    Issue: 1-2
    Date: 1920-07
    Page Range: 27--30
    Publication Info: London Academic Press, [etc.] 1833-1965