Berisford, C. W. 1969a. Hymenoptero.us parasites of Ips spp. bark beetles (Coleoptera: Scolytidae) in Virginia. Unpublished dissertation, Virginia Polytechnic Institute, Blacksburg. 130 p.
Berisford 1969
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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