Reference

V. S. Grebennikov (1982): Settlement of artificial domiciles by bumble bees in a micro-reserve near Novosibirsk; [Ru; 3 figs., 2 tabs., 1 ref. in footnote. 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) – : 119 - 124.