Appraisal of the quality of ground water in the Helena Valley, Montana
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TL;DRAbstract
7 2 0 -----Wa.ter-t evel contour Shows altitude of water level, July and August, 1971.Dashed where inferred.Contour interval 20 feet.
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7 2 0 -----Wa.ter-t evel contour Shows altitude of water level, July and August, 1971.Dashed where inferred.Contour interval 20 feet.
Keywords
Quality (philosophy)Hydrology (agriculture)GeologyArchaeologyEnvironmental scienceGeographyGeotechnical engineeringPhysics
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