Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Lanier, G. N., S. A. Teale, and J. A. Pajares. 1991. Biosystematics of the genus Ips (Coleoptera: Scolytidae) in North America: review of Ips calligraphus group . Canadian Entomologist 123:1103-1124.
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