- Birch, M. C., R. W. Bushing, T. D. Paine, S. L. Clement, and P. D. Smith. 1977. Pheromone traps to supress populations of the smaller European elm bark beetle. California Agriculture 31:4-6.
- Wood, D. L., and R. W. Bushing. 1963. The olfactory response of Ips confusus (LeConte) (Coleoptera: Scolytidae) to the secondary attraction in the laboratory. Canadian Entomologist 95:1066-1078.
- Bushing, R. W., and D. L. Wood. 1964. Rapid measurement of oleoresin exudation pressure in Pinus ponderosa Laws. Canadian Entomologist 96:510-513.
- Bushing, R. W. 1965. A synoptic list of the paracites of Scolytidae (Coleoptera) in North America north of Mexico. Canadian Entomologist.
- Bushing, R. W., and D. E. (. Bright. 1965. New Records of hymenopterous parasites from California Scolytidae (Coleoptera). Canadian Entomologist 97:199-204.
- Bushing, R. W. 1968a. Parasites of the western pine beetle Dendroctonus brevicomis LeConte (Coleoptera: Scolytidae), with particular reference to Roptrocerus xylophagorum (Ratzeburg) (Hymenoptera: Torymidae). Unpublished dissertation, University of California, Berkeley.
- 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.
- Bushing, R. W., and D. E. Bright. 1965. New records of hymenopterous parasites from California Scolytidae (Coleoptera) . Canadian Entomologist 97:199-204.
- Dahlsten, D. L., and R. W. Bushing. 1970. Insect parasites of the western pine beetle. Pages 113-118 in R. W. Stark D. L. Dahlsten (eds.), Studies on the population dynamics of the western pine beetle Dendroctonus brevicomis LeConte (Coleoptera: Scolytidae). University of California, Division of Agricultural Science, Berkeley. 174 p.
- Lyon, R. L., and R. W. Bushing. 1961. The construction and performance of a portable, precision spray chamber . Canadian Entomologist 93:785-794.