Ehnstrom, B., B. Bejer-Petersen, K. Tyniemi, and S. Tvermyr. 1974. Insect pests in forests of the Nordic countries 1967-1971 . Annales Entomologici Fennici 40:37-47.
Ehnstrom et al. 1974
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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