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Start Over You searched for: Language English Remove constraint Language: English Subject Groundwater Remove constraint Subject: Groundwater Title Starts With C Remove constraint Title Starts With: C Publication/Creation Date 1990 to 1991 Remove constraint Publication/Creation Date: <span class="from">1990</span> to <span class="to">1991</span>

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4. Clean Water Act research and monitoring : hearing before the Subcommittee on Environment of the Committee on Science, Space, and Technology, U.S. House of Representatives, One Hundred Second Congress, first session, June 5, 1991