Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Cook, S. P. 1982. Within-tree distributions and interspecific competition between Dendroctonus frontalis Zimmermann, Ips avulsus (Eichhoff) and I. calligraphus (Germar). Unpublished thesis, Texas A and M University, College Station. 99 p.