Literature cited
E. P. Mel'nikov, V. D. Obolkin, and A. A. Evstropov, Sov. Geol., No. 8, 36 (1981); V. D. Obolkin, E. P. Mel'nikov, and A. A. Evstropov, Izv. Akad. Nauk SSSR, No. 6, 119 (1981).
Author information
Authors and Affiliations
Additional information
Translated from Steklo i Keramika, No. 7, pp. 28–29, July, 1983.