| Reference | {Deposit:: STAFF, 1978 ENGINEERING AND MINING JOURNAL INTERNATIONAL}{Deposit:: DIRECTORY OF MINING, 1978, P. 276.}{Deposit:: A BAN ON SCHEELITE ORE EXPORTS, ENGINEERING AND MINING}{Deposit:: JOURNAL, SEPT. 1977, P. 44.}{Deposit:: LEFOND, S. J., BRAZILIAN MINING: RELAXED GO*. ATTITUDES}{Deposit:: PAVE THE WAY FOR EXPLOITING CRITICAL RESERVES, MINING}{Deposit:: ENGINEERING, NOV. 1973, P. 44.}{Deposit:: STAFF, MINING MAGAZINE, JAN. 1979, P. 55.}{Deposit:: YIH, STEPHEN W.H. AND WANG, CHUN T.; TUNGSTEN: SOURCES,}{Deposit:: METALLURGY, PROPERTIES, AND APPLICATIONS., PLENUM PRESS}{Deposit:: NEW YORK, 1979. P 47.}{Deposit:: ROSKILL INFORMATION SERVICES LTD., THE ECONOMICS OF TUNGSTEN}{Deposit:: *H EDITION 1990. P 55.} |