Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Rappaport, N., and D. Wood. 1994. Pityophthorus orarius Bright (Coleoptera: Scolytidae) in a northern California Douglas-fir seed orchard: Effect of clone, tree vigor, and cone crop on rate of attack . The Canadian Entomologist 126:1111-1118.