Hedlin, A. F., H. O. Yates, D. C. Tovar, B. H. Ebel, T. W. Koerber, and E. P. Merkel. 1980. Cone and seed insects of North American conifers. Canada Department of the Environment, Canadian Forestry Service, Ottawa, Ontario. 122 p.
Hedlin et al. 1980
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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