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  1. Check-list of the Hemiptera Heteroptera of North America, by Philip R. Uhler.
    By: Uhler, Philip R.
    Publication info: Brooklyn, N. Y.,Brooklyn Entomological Society,1886.
    Contributed by: University of California Libraries (archive.org)
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  2. Synopsis of the neuroptera of North America. With a list of the South American species. Prepared for the Smithsonian institution by Hermann Hagen.
    By: Hagen, Hermann August, - Uhler, Philip R.
    Publication info: Washington,Smithsonian institution,1861.
    Contributed by: University of California Libraries (archive.org)
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  3. Synopsis of the neuroptera of North America. With a list of the South American species. Prepared for the Smithsonian institution by Hermann Hagen.
    By: Hagen, Hermann August, - Uhler, Philip R.
    Publication info: Washington,Smithsonian institution,1861.
    Contributed by: MBLWHOI Library, Woods Hole
    BHL Collections: MBLWHOI Library, Woods Hole
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