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  1. By: Duffus, John H.
    Type: Article
    In: Journal of Conchology
    Volume: 27
    Issue: 4
    Date: 1971-05
    Page Range: 268--268
    Publication Info: London D. Bogue
  2. By: Duffus, John H. - Johnston, C. S.
    Type: Article
    In: Journal of Conchology
    Volume: 27
    Issue: 1
    Date: 1969-10
    Page Range: 27--45
    Publication Info: London D. Bogue