- Bowser, R. L., and H. J. Weir. 1975. Forest insect and disease surveys in the Central Region of Ontario, 1974. Canada Department of the Environment, Canadian Forestry Service, Great Lakes Forest Research Centre, Information Report O-X-226. 20 p.
- Jansons, V., and R. L. Bowser. 1975. Forest insect and disease survey in the southwestern region of Ontario, 1974. Canada Department of the Environment, Canadian Forestry Service, Great Lakes Forest Research Centre, Information Report O-X-227. 17 p.