Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Flamm, R. O., S. P. Cook, T. L. Wagner, P. E. Pulley, and R. N. Coulson. 1987. Reemergence and emergence of Ips avulsus and Ips calligraphus (Coleoptera: Scolytidae) . Environmental Entomology 16:869-876.
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