Nef, L. 1990a. Variabilité inter- et intra-arbres des attaques d'Ips typographus L. (Col., Scoiytidae) sur Picea abies Karst. [Within-trees and between-trees variability of the attacks of Ips typographus L. (Col., Scoiytidae) on Norway spruce]. Journal of Applied Entomology 110:516-523.
Nef 1990
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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