- Ollieu, M. M., and D. L. Williamson. 1965. Annual summary of the southern pine beetle control project in Texas. Texas Forest Service, Forest Pest Control Section. 11 p.
- Vite, J. P., and M. Williamson. 1970. Thanasimus dubius: prey perception . Journal of Insect Physiology 16:233-239.
- Williamson, D. L. 1961. The biology of Conophthorus monticolae Hopkins in northern Idaho (Coleoptera: Scolytidae). Unpublished thesis, University of Idaho, Moscow.
- Williamson, D. L. 1970. A pest management system for the southern pine beetle, Dendroctonus frontalis Zimmermann, in east Texas. Unpublished dissertation, Texas A and M University, College Station. 108 p.
- Williamson, D. L. 1971a. A pest management system for the southern pine beetle, Dendroctonus frontalis Zimmermann, in east Texas . Dissertation Abstracts 32:356.
- Williamson, D. L. 1971b. Management to reduce pine beetle infestations . Forest Farmer 306-7, 18.
- Williamson, D. L. 1971c. Olfactory discernment of prey by Medetera bistriata (Diptera: Dolichopodidae) . Entomological Society of America, Annals 64:586-589.
- Williamson, D. L. 1972. Management system for Dendroctonus frontalis populations . Folia Entomologica Mexicana 23- 24:85-86.
- Williamson, D. L., J. A. Schenk, and W. F. Barr. 1966. The biology of Conophthorus monticolae in northern Idaho . Forest Science 12:234-240.
- Williamson, D. L., and J. P. Vite. 1971. Impact of insecticidal control on the southern pine beetle population in east Texas . Journal of Economic Entomology 64:1440-1444.
- Williamson, R. L., and F. E. Price. 1971. Initial thinning effects in 70-150-year-old Douglasfir, western Oregon and Washington. United States Department of Agriculture, Forest Service, Pacific Northwest Research Laboratory, Research Paper PNW-117. 15 p.
- Robertson, I., B. Roitberg, I. Williamson, and S. Senger. 1995. Contextual chemical ecology: An evolutionary approach to the chemical ecology of insects . American Entomologist 41:237-239.