Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Keler, S. 1921. Kilka wyjasnien w drwalnika znaczonego (Xyloterus signatus F.) [Some explanation concerning the bark beetle: Xyloterus signatus F.]. Kosmos, Lemberg, Lwow, 46:100-104, 3 figs.
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