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  1. By: Akre, Roger D., - Torgerson, Richard L.
    Type: Article
    In: Psyche
    Volume: 75
    Date: 1968
    Page Range: 211--215
    Publication Info: Cambridge, Mass, Cambridge Entomological Club,
  2. By: Akre, Roger D., - Torgerson, Richard L.
    Type: Article
    In: The Pan-Pacific entomologist
    Volume: 45
    Date: 1969
    Page Range: 269--281
    Publication Info: San Francisco Pacific Coast Entomological Society