References
LI, K. C., 1955, TUNGSTEN, 3D. ED. REINOLD PUBLISHING CO. NEW YORKPERU-MAPA METALOGENETICO, 1969, AND, GUIA PARA EL MAPA METALOGENETICO DEL PERU, SOCIEDAD NACIONAL DE MINERIA Y PETROLEO, LIMA, PERU, NOV. 1969SIMONS, F. S. 1960, THE MINERAL DEPOSITS OF PERU, USGS UNPUBLISHED REPORT, PP. 1597-1617.LANDIS, G.P., AND RYE, R.O., 1974, GEOLOGIC, FLUID INCLUSION, AND STABLE ISOTOPE STUDIES OF THE PASTO BUENO TUNGSTEN-BASE METAL ORE DEPOSIT, NORTHERN PERU: ECONOMIC GEOLOGY, V. 69, P. 1025-1059.COMMUNIQUE, AMERICAN EMBASSY, PERU.ENGINEERING AND MINING JOURNAL, 1979, INTERNATIONAL DIRECTORY OF MINING.NGINEERING AND MINING JOURNAL, 1979, P. 324.LANDIS, G.P., AND RYE, R.O., 1974, OLOGIC, FLUID INCLUSION AND STABLE ISOTOPE STUDIES OF THE PASTO BUENO TUNGSTEN-BASE METAL ORE DEPOSIT, NORTHERN PERU: ECONOMIC GEOLOGY, V. 69, NO. 7, P. 1025-1059.NORMAN, D.I., AND LANDIS, C.P., 1983, SOURCE OF MINERALIZING COMPONENTS IN HYDROTHERMAL ORE FLUIDS AS EVIDENCED BY 87SR/86SR AND STABLE ISOTOPE DATA FROM PASTO BUENO DEPOSIT, PERU: ECONOMIC GEOLOGY, V. 78, NO. 3, P. 451-465.HYDE, D.M., 1982, THE MINERAL INDUSTRY OF PERU, PREPRINT FROM THE 1982 BUREAU OF MINES MINERALS YEARBOOK, 16 P.PETERSEN, U., 1980, METALLOGENESIS IN SOUTH AMERICA: PROGRESS AND PROBLEMS, INTERNATIONAL SYMPOSIUM PUBLICATION IUGS, NO 5, P. 249-274.ROSKILL INFORMATION SERVICES LTD., 1977, NOTES ON INDIVIDUAL PRODUCING AND CONSUMING COUNTRIES, IN TUNGSTEN: THIRD EDITION, LONDON, ROSKILL INFORMATION SERVICES LTD., P. 115-187.PURSER, W.F.C., 1971, METAL-MINING IN PERU: PAST AND PRESENT, NEW YORK, PRAEGER PUBLISHERS, 339 P.BUNDESANSTALT FUR GEOWISSENSCHAFTEN UND ROHSTOFFE, HANNOVER, 1977, UNTERSUCHUNGEN UBER ANGEBOT UND NACHFRAGE MINERALISCHER ROHSTOFFE: IX WOLFRAM, P. 1-23.ANSTETT, T.F., BLEIWAS, D.I., AND HURDELBRINK, R.J., 1985, TUNGSTEN AVAILABILITY-MARKET ECONOMY COUNTRIES, U.S. BUREAU OF MINES, INFORMATION CIRCULAR 9025, 51 P.SANTOLLALA, F.M., 1954, EL TUNGSTENIO EN EL PERU, BOLETIN DE LA SOCIEDADA GEOLOGICA DEL PERU, VOL XXVII, P. 80-100.WILLIG, C.D. AND DELGADO, J., 1985, SOUTH AMERICA AS A SOURCE OF TUNGSTEN, IN MPR PUBLISHING SERVICES LTD. (ED.), PROCEEDINGS OF THE THIRD INTERNATIONAL TUNGSTEN SYMPOSIUM, MADRID, MAY 13-17, 1985, P. 63.ANUARIO MINERO-COMERCIAL, LA MINERIA EN EL PERU, 1985/86, VOL. 22, LIMA, EDITORES TECNICOS ASSOCIADOS.