Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Tripp, H. A., D. A. Ross, and G. A. Van Sickle. 1976. Pacific Region. Pages 75-87. Canada Department of Fisheries and Environment, Canadian Forestry Service, Forest Insect and Disease Survey, Annual Report 1975. 103 p.
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