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  1. By: Langdon, A. W.
    Type: Article
    In: Quarterly journal of conchology
    Volume: 1
    Issue: 6
    Date: 1875-08
    Page Range: 89--92
    Publication Info: London D. Bogue
  2. By: Langdon, A. W.
    Type: Article
    In: Quarterly journal of conchology
    Volume: 1
    Issue: 5
    Date: 1875
    Page Range: 71--76
    Publication Info: London D. Bogue