Geier, Theodore W.Perry, James A.2014-07-112014-07-111992-09https://hdl.handle.net/11299/163887The protection of ground water quality has become an important issue in recent years. Ground water systems have traditionally been viewed as inexhaustible sources of clean water, but it is now clear that they require sound management and protection if they are to continue to provide the needs of modern society.en-USGround water -- MinnesotaReport