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  1. By: Costen, P. D. M.
    Type: Article
    In: The entomologist's record and journal of variation
    Volume: 115
    Date: 2003
    Page Range: 224--225
    Publication Info: [London s.n
  2. By: Costen, P. D. M.
    Type: Article
    In: The entomologist's record and journal of variation
    Volume: 108
    Date: 1996
    Page Range: 80--80
    Publication Info: [London s.n
  3. By: Costen, P. D. M.
    Type: Article
    In: The entomologist's record and journal of variation
    Volume: 116
    Date: 2004
    Page Range: 221--222
    Publication Info: [London s.n
  4. By: Costen, P. D. M. - Peet, T N D
    Type: Article
    In: The entomologist's record and journal of variation
    Volume: 98
    Date: 1986
    Page Range: 217--218
    Publication Info: [London s.n
  5. By: Costen, P. D. M.
    Type: Article
    In: The entomologist's record and journal of variation
    Volume: 116
    Date: 2004
    Page Range: 263--265
    Publication Info: [London s.n