Austara, O., and H. Pettersen. 1977. Seasonal flight activity and attack pattern of Ips typographus in Norway under epidemic conditions . Meddelelser fra det Norsk Institut for Skogforskning 33:254-268.
Austara & Pettersen 1977
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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