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  1. By: Sheldon, Joseph K
    Type: Article
    In: Psyche
    Volume: 75
    Date: 1968
    Page Range: 107--117
    Publication Info: Cambridge, Mass, Cambridge Entomological Club,
  2. By: Sheldon, Joseph K - MacLeod, Ellis G.
    Type: Article
    In: Psyche
    Volume: 78
    Date: 1971
    Page Range: 107--121
    Publication Info: Cambridge, Mass, Cambridge Entomological Club,