| Reference | {Production:: ALUMINUM PRODUCTION COST SURVEY, 1980-1985 BROOK HUNT AND}{Production:: ASSOCIATES LTD. PG.304 (RECORDS 1-4,8)}{Production:: ALUMINUM PRODUCTION COST SURVEY, 1988 BROOK HUNT AND ASSOC-}{Production:: IATES LTD. PG.2.34 (RECORDS 5-7,9)} |