Ferrell, G. T., C. J. D. Mars, C. B. Williams, and W. J. Otrosina. 1988. Fir engraver outbreaks and tree mortality related to forest site and stand characteristics . Northwest Environmental Journal 4:334-335.
Ferrell et al. 1988
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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