Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Saschev, B. 1950. Untersuchungen uber die Biologie und Okologie des scharfzahnigen Kiefernborkenkafers (Ips acuminatus Gyll.) in Bulgarien [In Bulgarian]. God. SSA "Georgi Dimitrov", Lesotechn. Fak., Bd. 3.
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