| Reference | {Deposit:: ENGINEERING AND MINING JOURNAL, INTERNATIONAL DIRECTORY OF MINING AND MINERAL PROCESSING OPERATIONS, 1978 PP 153, 318.}{Deposit:: MINING AND MINERAL PROCESSING OPERATIONS, 1981 PP 327, 332.}{Geology:: SIMONS, FRANK S., AND MAPES, EDUARDO V., GEOLOGY AND ORE DEPOSITS OF THE ZIMAPAN MINING DISTRICT, STATE OF HIDALGO, MEXICO, GEOLOGICAL SURVEY, PROF. PAP. 284, 1956.}{Production:: ROVIROSA, NOCOLAS Y., HYDROMET MAY FREE SMALL LEAD DISTRICTS FROM THE SMELTER, MINING ENGINEERING, FEB. 1979, PP 147-149}{Reserve-Resource:: INDUSTRIAS PENOLES, S.A. DE C.V., PENOLES GRUPO MINAS, COMPANY REPORT, CIA. FRESNILLO, S.A. DE C.V., UNIDAD ZIMAPAN, JUNIO (JUNE), 1991.} |