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  1. By: Stockwell, Scott A - Nilsson, Jan A
    Type: Article
    In: The Journal of arachnology
    Volume: 15
    Issue: 2
    Date: 1987
    Page Range: 151--156
    Publication Info: [Lubbock, Tex.], American Arachnological Society,
  2. By: Nilsson, Jan A
    Type: Article
    In: Memoirs of the American Entomological Society
    Volume: 41
    Date: 1993
    Page Range: 1--104
    Publication Info: Philadelphia, American Entomological Society, 1916-