- Gerber, H. S., N. V. Tonks, and D. A. Ross. 1980. The recognition and life history of the major insect and mite pests of ornamental shrubs and shade trees of British Columbia. (Provincial?) Department of Agriculture, Victoria, British Columbia. 55 p.
- Gerber, H. S., N. V. Tonks, and D. A. Ross. 1983. Insects and mite pests of ornamental shrubs and shade trees of British Columbia. Ministry of Agriculture and Food, Province of British Columbia, Victoria. 53 p.