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  1. By: Orton, P D
    Type: Article
    In: The entomologist's record and journal of variation
    Volume: 100
    Date: 1988
    Page Range: 20--20
    Publication Info: [London s.n
  2. By: Orton, P D
    Type: Article
    In: The entomologist's record and journal of variation
    Volume: 100
    Date: 1988
    Page Range: 47--47
    Publication Info: [London s.n