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1.- BASIN OF MEXICO; A HISTORY OF WATERSHED MISMANAGEMENT
ROCKY MOUNTAIN RESEARCH STATION; FORT COLLINS, CO; USA; UNITED STATES, 2000
LAND STEWARDSHIP IN THE 21ST CENTURY; THE CONTRIBUTIONS OF WATERSHED MANAGEMENT; CONFERENCE PROCEEDINGS
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2.- MICROBIOLOGICAL GROUNDWATER QUALITY AND HEALTH INDICATORS IN MEXICO CITY
KLUWER ACADEMIC PUBLISHERS; BOSTON-DORDRECHT-LONDON; III; INTERNATIONAL, 2000
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