| References: |
- Deposit:: 1978 ENGINEERING AND MINING JOURNAL INTERNATIONAL DIRECTORY
- Deposit:: OF MINING AND MINERAL PROCESSING OPERATIONS, MCGRAW-HILL
- Deposit:: 1978, P. 270.
- Deposit:: WORLD MINING, WHA* GOING ON IN WORLD MINING, V. 30, NO. 6,
- Deposit:: AUGUST 1977, P. 97.
- Deposit:: ROMAN, GEORGE H., 1979-1980 WORLD MINES REGISTER, MILLER
- Deposit:: FREEMAN PUBLICATIONS, INC. V. 32, 1979, P. 36, 103.
- Deposit:: NIGHTINGALE, WILLIAM G., MINING INTERNATIONAL YEARBOOK,
- Deposit:: 1978, THE FINANCIAL TIMES LIMITED, 1978, P. 382, 577.
- Deposit:: WOLFRAM BERGBAU UND HUTTENGESELLSCHAFT M.B.H. COMPANY REPORT
- Deposit:: 2ND EDITION, JANUARY 1978.
- Deposit:: MINING MAGAZINE, MINING ACTIVITY IN THE WESTERN WORLD,
- Deposit:: V. 140, NO. 1, JANUARY 1979, P. 71.
- Deposit:: TUNGSTEN NEWS, AMAX JULY 1977, P. 1.
- Deposit:: GIBBS, E.C., ENGINEERING AND MINING JOURNAL, TUNGSTEN-RISING
- Deposit:: DEMAND, NEW PRODUCTION FOR 1977, V. 178, NO. 3, MARCH 1977
- Deposit:: P. 110.
- Deposit:: MINING JOURNAL, MINING WEEK, V. 291, NO. 7479, DECEMBER 22,
- Deposit:: 1978, P. 483, 484.
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