Billings, R. F. 1974a. Host selection and attack behavior of Dendroctonus ponderosae Hopkins (Coleoptera: Scolytidae) in ponderosa pine of eastern Washington. Unpublished dissertation, University of Washington, Seattle. 247 p.
Billings 1974
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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