Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Callaham, R. Z. 1953b. Host specificity in the Dendroctonus-Pinus complex. United States Department of Agriculture, Rureau of Entomology and Plant Quarantine, Forest Insect Laboratory, Rerkeley, California, Special Report RX-11. 12 p.