Reference

E. S. Ivanov, T. P. Samokhvalova (1994): On organisation of reservation of [wild] bees; Ryazan [Ru]. Non visum. – In: ESKOV, E. K. (ed.). Ecology and Reservation of Natural Environments. The 1st Inter-national (4th All-Russian) Conference (Ryazan, 15-16 September 1994). Abstracts. Ryazan – : 138 - 139.