Reference

M. V. Berezin (1994): The social organisation of bumble bees (Hymenoptera, Apidae, Bombus) in the Arctic (Wrangel Island); p. 320. [En. Date: 21.VIII.1994]. – In: LENOIR, A., et al. (editorial board). Les Insectes Sociaux. The 12th Congress of the International Union for the Study of Social Insects, IUSSI (Paris, Sorbonne, 21-27 August, 1994). [Abstracts]. Paris (Université Paris Nord) – .