Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Okolow, C. 1968. Cykl rozwojowy jesniaka czarnego, Hylesinus crenatus Fabr. (Col., Scol.) [Life cycle of the large ash bark beetle, Hylesinus crenatus]. Polskie pismo entomologiczne, Wroclaw 38: 627-630.
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