- Barker, J. A. 1976. Observations on lightwood induction field experiments installed by International Paper Company. Page 47 in M. H. Esser (ed.), Lightwood Research Coordinating Council, proceedings of the annual meeting, Jacksonville, Florida and Asheville, North Carolina, 20-21 January 1976. United States Department of Agriculture, Forest Service, Southern Forest Experiment Station. 154 p.
- Barker, J. A., and J. J. Schmid. 1976. Paraquatinduced lightening in slash pine. Pages 88-92 in M. H. Esser (ed.), Lightwood Research Coordinating Council, proceedings of the annual meeting, Jacksonville, Florida, and Asheville, North Carolina, 20-21 January 1976. United States Department of Agriculture, Forest Service, Southeastern Forest Experiment Station. 154 p.
- Barker, R. J. 1958. Notes on some ecological effects of DDT sprayed on elms . Journal of Wildlife Management 22:269-274.
- Barker, W. J., and W. C. Nettles. 1954. Controlling pine beetles in South Carolina woodlands. Clemson Agricultural College, Extension Service, Circular 239. 6 p.
- Flory, C. H., W. C. Nettles, and W. J. Barker. 1955. Forest insects and diseases of South Carolina trees [Southern pine beetle, p. 10-12]. Clemson Agricultural College of South Carolina, State Commission of Forestry, Extension Bulletin 116. 40 p.
- McGuffin, W. C., and R. B. Barker. 1947. Prairie provinces forested area . Canada Department of Agriculture, Science Service, Division of Entomology, Forest Insect Investigations, Forest Insect Survey, Annual Report 1946:57.
- Whitten, R. R., and W. C. Barker. 1939. Tests with various elm-wood traps for bark beetles . Journal of Economic Entomology 32:630-634.