Reference | {Deposit:: STRISHKOV, E. M. SOVIET UNION. MINING ANNUAL REVIEW.}{Deposit:: MINING JOURNAL, LONDON, JUNE 1976, 491 P., JUNE 1979, 585}{Deposit:: BRITISH SULPHUR CORPORATION LIMITED, WORLD SURVEY OF SULPHUR}{Deposit:: RESOURCES, THIRD EDITION, 1985, PP. 135-136.} |