Reference

V. S. Grebennikov (1982): The reservation and utilisation of wild insect pollinators; [Ru; 3 figs., 10 refs. Date: 23.VI.1982]. – In: GREBENNIKOV, V. S. (ed.). Insect Pollinators of Agricultural Plants. A Col-lection of Scientific Papers. Novosibirsk (Siberian Branch of the V. I. LENIN All-Union Academy of Agricultural Sciences) – : 3 - 10.