| Reference | {Production:: ALUMINUM PRODUCTION COST SURVEY, 1980-1985 BROOK HUNT AND}{Production:: ASSOCIATES LTD. PG. 311(RECORDS 1-4,11)}{Production:: ALUMINUM PRODUCTION COST SURVEY, 1988 BROOK HUNT AND ASSOC-}{Production:: IATES LTD. PG.2.39 (RECORDS 5-8,12,13)}{Production:: MBM. JULY 1991, P. 31.} |