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3. Águas subterrâneas

27. Bulletin

31. Citizen's guide to ground-water protection

32. 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

59. Espanola Valley and Pojoaque Valley wastewater master plan : hearing before the Committee on Environment and Public Works, United States Senate, One Hundred First Congress, second session, March 14, 1990--Pojoaque Pueblo, New Mexico