Reference

N. N. Blagoveshchenskaya (1970): Results of the study of solitary bees in the Middle Volga basin; [Ru. Date: 20.VIII.1970]. – In: POPOV, V. A. (ed.). The Resulting Scientific Conference of Zoologists of the Volgo-Kama Region. Proceedings. Kazan (Ministry of the Higher and Middle Special Edu-cation of the USSR) – : 212 - 217.