Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Zasev, B. 1952a. Merki za borba srestu vachovija korojad (Ips acuminatus Gyll.) pri uslovijata u mas [Control of Ips acuminatus under Bulgarian conditions] . Nauc Trud lesoteh Fak. selkostopan Adad., Sofia 1:109-120.
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