Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Dyer, E. D. A., and W. W. Nijholt. 1965. Observations of overwintering Pseudohylesinus and Trypodendron . Canada Department of Forestry, Forest Entomology and Pathology Branch, Bi-monthly Progress Report 21:3.
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