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1.- CONTAMINATION OF A MUNICIPAL GROUNDWATER SUPPLY WITH NITRATES FROM AQUAS NEGRAS (RAW SEWAGE), CD. CHIHUAHUA, MEXICO
AMERICAN GEOPHYSICAL UNION; WASHINGTON, DC; USA; UNITED STATES, 1994
AGU 1994 FALL MEETING
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2.- VARIATION IN GALENA SOLID SOLUTION COMPOSITIONS AT SANTA EULALIA, CHIHUAHUA, MEXICO; IMPLICATIONS FOR METAL ZONING
GEOLOGICAL SOCIETY OF AMERICA (GSA); BOULDER, CO; USA; UNITED STATES, 1997
GEOLOGICAL SOCIETY OF AMERICA, SOUTH-CENTRAL SECTION, 31ST ANNUAL MEETING AND ROCKY MOUNTAIN SECTION, 50TH ANNUAL MEETING
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