[The problem of ground water contamination].
D005068:Eutrophication; D005618:Fresh Water / Q000032:analysis; D014871:Water Microbiology; D014876:Water Pollution / Q000032:analysis / Q000517:prevention & control; D014877:Water Pollution, Chemical / Q000032:analysis; D014881:Water Supply / Q000032:analysis
El problema de la contaminación de las aguas subterráneas.