San Cristobal/Huaripampa Division

ENGINEERING AND MINING JOURNAL INTERNATIONAL DIRECTORY OFMINING AND MINERAL PROCESSING OPERATIONS, PERU: NEWYORK, MCGRAW-HILL, 1978, P. 326-327.RIO TINTO ZINC MINING COST ANALYSIS SYSTEM, PERFORMANCEANALYSIS: MAY 27, 1975, P. 376.MINING MAGAZINE, CENTRAL AND SOUTH AMERICA: PERU: V. 136,NO. 6, 1977, P. 474.MINING MAGAZINE, SOUTH AMERICA: PERU: V. 121, NO. 3, 1969,P. 241.MINING MAGAZINE, PERU: V. 127, NO. 2, 1972, P. 295.WORLD MINING CATALOG, SURVEY AND DIRECTORY NUMBER, PERU:V. 122, NO. 6, 1970, P. 147.PETERSEN, U., REGIONAL GEOLOGY AND MAJOR ORE DEPOSITS OFCENTRAL PERU: ECONOMIC GEOLOGY, V. 60, NO. 3, 1965,P. 408-426, 462-465.SURVEY OF WORLD LEAD AND ZINC PRODUCTION, 1968, P. 70-71.SOURCE IS NOT KNOWN.HALEY, D. H., PERU: A SPECIAL REPORT: MINING ENGINEERING,V. 26, NO. 1, 1974, P. 17-28.MINING MAGAZINE, THE MINERAL INDUSTRY OF PERU: V. 131,NO. 4, 1974, P. 262-285.WORLD MINES REGISTER, COMPANIES BY COUNTRY: PERU: SANFRANCISCO, MILLER FREEMAN, INC., 1979, P. 148.THE PERU REPORT'S "LAS MINAS DEL PERU - MINES AND MINERS INPERU", PP 137, 138.