Reference

O. F. Grobov, L. N. Guzeva, K. S. Chernov, O. P. Shatskaya, N. D. Dobrynin (1984): Methods for the Study of Pathogenes and Pests in the Leaf-Cutter Bees. — 69 pp.; [Ru; 16 figs., 22 refs. Date: 12.IX.1984]. – Moscow (V. I. LENIN All-Union Academy of Agricultural Sciences) – .