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1.- EVALUACION DE LA CALIDAD DE AGUA EN LA REGION NORESTE DEL ESTADO DE SONORA, MEXICO ;WATER QUALITY ASSESSMENT OF THE NORTHEASTERN REGION OF THE STATE OF SONORA, MEXICO
ROCKY MOUNTAIN RESEARCH STATION; FORT COLLINS, CO; USA; UNITED STATES, 1998
CROSS BORDER WATERS; FRAGILE TREASURES FOR THE 21ST CENTURY
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