| Reference | {Production:: *CRU MONITOR, MAY 1992, P. 8.}{Production:: *CRU QUARTERLY MARKET SERVICE, LEAD, JAN. 1994, P. 47.}{Production:: CRU ZINC MONITOR-SEPTEMBER 1996}{Reserve-Resource:: M.I.M. HOLDINGS LTD. 1990 ANNUAL REPORT}{Reserve-Resource:: *CRU METAL MONITOR, ZINC, OCT. 1991, P. 7.}{Reserve-Resource:: AME MINERAL ECONOMICS QUARTERLY MINE ANALYSIS, JUN 1993,}{Reserve-Resource:: P. 38, 43, 48.} |