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1.- LEAD ISOTOPE COMPOSITIONS OF ECUADORIAN ORES AND IGNEOUS ROCKS GEOLOGICAL SOCIETY OF AMERICA (GSA); BOULDER, CO; USA; UNITED STATES, 1995 GEOLOGICAL SOCIETY OF AMERICA, 1995 ANNUAL MEETING Ver registro
2.- ND ISOTOPE CONSTRAINTS ON SOURCES OF NEOPROTEROZOIC TO EARLY CAMBRIAN SILICICLASTIC SEDIMENTARY ROCKS IN NORTHERN SONORA PERGAMON; OXFORD; GBR; UNITED KINGDOM, 2001 GEOLOGY OF NORTHWESTERN MEXICO AND ADJACENT AREAS Ver registro
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