Menzie, W. David Grade and tonnage model of sedimentary exhalative Pb-Zn - Reston, VA U.S. Geological Survey 1986 - pp. 212-215 ilus. - U.S. Geological Survey Bulletin n.1693 . Subjects--Topical Terms: GENESIS-YACIMIENTOGEOLOGIA ECONOMICALEY MINERALMODELOS GENETICOSPLOMO-ZINCPROSPECCION MINERARESERVAS MINERALESROCAS SEDIMENTARIASSULFUROS MASIVOSYACIMIENTOS EXHALATIVOS