Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Lanier, G., S. Teale, and J. Pajares. 1991. Biosystematics of the genus Ips (Coleoptera: Scolytidae) in North America: review of the Ips calligraphus group. The Canadian Entomologist 123:1103-1124. (Data in this reference recorded in 1992 catalog).