| Reference | {Ownership:: METAL BULLETIN, P. 7 (AUG. 23, 1993).}{Ownership:: MINING JOURNAL, (AUG. 20, 1993).}{Ownership:: ENGINEERING & MINING JOURNAL, P. WW-95 (NOV. 1993).}{Production:: ALUMINUM PRODUCTION COST SURVEY, 1980-1985 BROOK HUNT AND}{Production:: ASSOCIATES LTD. PG. 277} |