Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Bushing, R. W. 1968b. Parasites of the western pine beetle, Dendroctonus brevicomis LeConte (Coleoptera: Scolytidae), with particular reference to Roptrocerus xylophagorum (Ratzeburg) (Hymenoptera: Torymidae). Dissertation Abstracts 28(7-B): 2886B.