Austara, O., H. Pettersen, and A. Bakke. 1977. Bivoltinism in Ips typographus in Norway, and winter mortality in second generation . Meddelelser fra det Norske Institut for Skogforskning 33:272-281.
Austara et al. 1977
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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