Helzner, R., and M. Moyer. 1979. Forest insect and disease conditions: Intermountain Region, 1978. United States Department of Agriculture, Forest Service, State and Private Forestry, Intermountain Region, Ogden, Utah. 19 p.
Helzner & Moyer 1979
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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