Committee On Usgs Water Resources Research
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bibliografia
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Estimating Water Use In The United StatesNATIONAL ACADEMIES PRESS08-200260,56€portes grátis
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Investigating Groundwater Systems On Regional And National ScalesNATIONAL ACADEMIES PRESS12-2000100,31€portes grátis
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Preparing For The Twenty-First CenturyNATIONAL ACADEMIES PRESS01-1991100,31€portes grátis