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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Spence, G C
    Type: Article
    In: Journal of conchology
    Volume: 16
    Date: 1922
    Page Range: 265--267
    Publication Info: London D. Bogue
  2. By: Spence, G C
    Type: Article
    In: Journal of conchology
    Volume: 16
    Date: 1919
    Page Range: 43--43
    Publication Info: London D. Bogue