Reference

N. M. Detkova (1954): The role of bees among animal populations in lucerne fields; [Ru; 1 tab., 7 refs. Date: [31.XII].1954]. – In: NEFEDOV, N. I. (ed.). Collection of Students Papers. No. 1. Chair for Zoology and Botany. Stalingrad (Stalingrad State Pedagogical Institute) – : 12 - 16.