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  1. By: Ford, T H - Shaw, M R - Robertson, D M
    Type: Article
    In: The entomologist's record and journal of variation
    Volume: 112
    Date: 2000
    Page Range: 25--36
    Publication Info: [London s.n
  2. By: Bland, Keith P. - Robertson, D M
    Type: Article
    In: The entomologist's record and journal of variation
    Volume: 110
    Date: 1998
    Page Range: 30--30
    Publication Info: [London s.n