- Forbes, S. A. 1890b. The American plum borer, Euzophera semi-funeralis Walk. Psyche 5295.
- Forbes, A. C. 1899. The bark-beetles of the ash (Hylesi-nus crenatus, H fraxini, and H oleiperda) . Royal Highland and Agricultural Society of Scotland, Transactions 11:245-262.
- Forbes, A. C. 1910. The economic importance of Scolytidae in Irish Forestry . Irish Naturalist 19:89-91.
- Forbes, B. 1948. The battle of Idaho's panhandle. DDT saves nearly 400,000 acres of northern Idaho's timberland from devastation by insects. Hunting and Fishing 25(3):40-41, 57.
- Forbes, B. 1956. Hot logging . American Forests 62:20-22.
- Forbes, R. D. 1930. Timber growing and logging and turpentining practices in the southern pine region [Scolytidae, p. 103]. United States Department of Agriculture, Technical Bulletin 204.
- Forbes, R. S., W. J. Carroll, G. R. Underwood, and F. G. Cuming. 1957. Atlantic Provinces . Canada Department of Agriculture, Forest Biology Division, Forest Insect and Disease Survey, Annual Report 1956:7-21.
- Forbes, R. S., G. R. Underwood, and F. G. Cuming. 1965. Maritime Provinces. Forest insect conditions. Pages 21-31. Canada Department of Forestry, Forest Entomology and Pathology Branch, Forest Insect and Disease Survey, Annual Report 1964. 141 p.
- Forbes, R. S., G. R. Underwood, F. G. Cuming, and D. C. Eidt. 1961. Maritime Provinces. Forest Insect survey. Pages 17-30. Canada Department of Forestry, Forest Entomology and Pathology Branch, Forest Insect and Disease Survey, Annual Report 60. 121 p.
- Forbes, R. S., G. R. Underwood, and G. A. Van Sickle. 1969a. Maritimes Region. Pages 17-33. Canada Department of Forestry and Rural Development, Forestry Branch, Canadian Forestry Service, Forest Insect and Disease Survey, Annual Report 1967. 143 p.
- Forbes, R. S., G. R. Underwood, and G. A. Van Sickle. 1969b. Maritimes Region. Canada Department of Fisheries and Forestry, Canadian Forestry Service, Forest Insect and Disease Survey, Annual Report 1968. 141 p.
- Forbes, R. S., G. R. Underwood, and G. A. Van Sickle. 1970. Maritimes Region. Pages 20-36. Canada Department of Fisheries and Forestry, Forest Service, Forest Insect and Disease Survey, Annual Report 1969. 125 p.
- Forbes, R. S., G. R. Underwood, and G. A. Van Sickle. 1973. Maritimes Region. Pages 19-32. Canada Department Environment, Canadian Forestry Service, Forest Insect and Disease Survey, Annual Report 1972. 107 p.
- Forbes, R. S., G. R. Underwood, and G. A. Van Sickle. 1979. Maritimes Region. Pages 21-36. Canada Department of the Environment, Canadian Forestry Service, Forest Insect and Disease Survey, Annual Report 1974. 109 p.
- Forbes, S. A. 1890a. Noxious and beneficial insects of the State of Illinois. Illinois Department of Agriculture, 16th Report of State Entomologist for 1887-1888. 104 p.
- Forbes, S. A. 1891. The fruit bark beetle (Scolytus rugulosus Ratz.). Order Coleoptera. Family Scolytidae. Illinois Department of Agriculture, State Entomologist, Bulletin 4:63-81, 1 fig.
- Forbes, S. A. 1894. Noxious and beneficial insects of the State of Illinois. Illinois Department of Agriculture, 18th Report of the State Entomologist. 171 p.
- Forbes, S. A. 1911. Some important insects of Illinois shade trees and shrubs . University of Illinois, Agricultural Experiment Station, Urbana, Bulletin 10:463-529.
- Hoffman, D. S., and R. H. Forbes. 1947. Modern chemistry controls forest insect outbreak . Chemical and Engineering News 25:2499-2500.
- Magasi, L. P., T. E. Steiner, and R. S. Forbes. 1977. Maritimes region. Pages 19-31. Canada Department of Fisheries and the Environment, Canadian Forestry Service, Forest Insect and Disease Survey, Annual Report 1975. 103 p.
- Reeks, W. A., R. S. Forbes, and F. G. Cuming. 1948. Maritime provinces and Newfoundland . Canada Department of Agriculture, Science Service, Division of Entomology, Forest Insect Investigations, Forest Insect Survey, Annual Report 1947:14.
- Reeks, W. A., R. S. Forbes, and F. G. Cuming. 1949. Maritime provinces and Newfoundland . Canada Department of Agriculture, Science Service, Division of Entomology, Forest Insect Investigations, Forest Insect Survey, Annual Report 1948:15.
- Reeks, W. A., R. S. Forbes, and F. G. Cuming. 1953. Maritime provinces, forest insect survey . Canada Department of Agriculture, Science Service, Division of Forest Biology, Forest Insect and Disease Survey, Annual Report 1952:11.
- Reeks, W. A., C. C. Smith, and R. S. Forbes. 1945. Summary report of forest insect survey, Maritime provinces and Newfoundland . Canada Department of Agriculture, Science Service, Division of Entomology, Forest Insect Investigations, Forest Insect Survey, Annual Report 1944:6.
- Reeks, W. A., C. C. Smith, and R. S. Forbes. 1946. Maritime provinces and Newfoundland . Canada Department of Agriculture, Science Service, Division of Entomology, Forest Insect Investigations Forest Insect Survey, Annual Report 1945:10.
- Smith, C. C., and R. S. Forbes. 1968. Dutch elm disease in New Brunswick, 1957-1967. Canada Department of the Environment, Canadian Forestry Service, Maritime Forest Research Centre, Information Report M-X-14.
- Forbes, R. S., G. R. Underwood, D. C. Eidt, F. G. Muming, and W. J. Carroll. 1958. Pages 9-21 in Atlantic provinces, forest insect survey Canada Department of Forestry, Forest Entomology and Pathology Branch, Forest Insect and Disease Survey, Annual Report 1958.