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1.- ALWAYS THE BRIDESMAID, NEVER THE BRIDE; COBALT GEOLOGY AND RESOURCES INSTITUTION OF MINING AND METALLURGY (IMM) AND INSTITUTION OF MINING ENGINEERS (IMINE); DONCASTER; G, 2000 ANNUAL COMMODITY MEETING ON COBALT; ABSTRACTS Ver registro
2.- APPLICATION OF ENZYME LEACH SOIL ANALYSIS FOR EPITHERMAL GOLD EXPLORATION IN THE ANDES OF ECUADOR PERGAMON; OXFORD-NEW YORK-BEIJING; III; INTERNATIONAL, 2002 Ver registro
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