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  1. By: Grigarick, Albert A. - Schuster, R O - Nelson, D R
    Type: Article
    In: The Pan-Pacific entomologist
    Volume: 59
    Issue: 1-4
    Date: 1983
    Page Range: 64--77
    Publication Info: San Francisco Pacific Coast Entomological Society
  2. By: Kathman, R Deedee - Nelson, D R
    Type: Article
    In: Journal of the Entomological Society of British Columbia
    Volume: 86
    Date: 1989
    Page Range: 66--70
    Publication Info: [Victoria, etc.], Entomological Society of British Columbia,
  3. By: Nelson, D R - Welsh, Stanley L.
    Type: Article
    In: Rhodora
    Volume: 95
    Date: 1993
    Page Range: 197--213
    Publication Info: [Cambridge, Mass., etc.] New England Botanical Club [etc.]