Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Zolk, K. 1932a. Die Borkenkafer (Ipidae) Estlands mit kurzer Berucksichtigung ihrer Bionomie u. Verbreitung [In Estonian, German summary]. Tartu Ulikooli Entomoloogia-Katsejaama teadaanded 14:1-52, 13 pls.
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