Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Spessivtsev, P. (. P. 1931c. Opredelitel' koroedov evropeiskoi chasti SSSR (zaisklyucheniem Kryma i Kavkaza). Izd. 3 Pod red. M. N. Rimskogo-Korsakova, Sel'khozgiz, Moscau-Leningrad.
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