Langström, B., and C. Hellqvist. 1993b. Scots pine susceptibility to attack by Tomicus piniperda L. as related to pruning date and attack density. Annales des Sciences Forestières 50:101-117.
Langström & Hellqvist 1993
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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