Bowers, W. W., J. H. Borden, and G. Gries. 1988. Aggregation pheromone of the four-eyed spruce bark beetle, Polygraphus rufipennis Kirby (Coleoptera: Scolytidae). International Congress of Entomology, Proceedings 18: 430. *Boyd, W. M. 1945. [Scolytus rugulosus]. New Jersey Department of Agriculture, Circular 355: 131-135.
Bowers et al. 1988
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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