| Reference | {Production:: ALUMINUM PRODUCTION COST SURVEY, 1980-1985 BROOK HUNT AND}{Production:: ASSOCIATES LTD. PG.283 (RECORDS 1-4, 9)}{Production:: ALUMINUM PRODUCTION CSOT SURVEY, 1988 BROOK HUNT AND ASSOC-}{Production:: IATES LTD. PG.2.27 (RECORDS 5-8,10)} |