Singer, Donald A. Grade and tonnage model of synorogenic-synvolcanic Ni-Cu - Reston, VA U.S. Geological Survey 1986 - pp. 28-31 ilus. - U.S. Geological Survey Bulletin n.1693 . Subjects--Topical Terms: COBREGENESIS-YACIMIENTOGEOLOGIA ECONOMICALEY MINERALMODELOS GENETICOSNIQUELPROCESOS SINTECTONICOSRESERVAS MINERALESVOLCANISMO