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3. National Brackish Groundwater Assessment

4. National Ground Water Contamination Research Act : hearing before the Subcommittee on Water and Power Resources of the Committee on Interior and Insular Affairs, House of Representatives, Ninety-ninth Congress, second session, on H.R. 3906 ... hearing held in Hartford, CT, June 13, 1986

5. National Ground Water Contamination Research Act : hearing before the Subcommittee on Water and Power Resources of the Committee on Interior and Insular Affairs, House of Representatives, Ninety-ninth Congress, second session on H.R. 3906, to provide for the assessment by the United States Geologic Survey of the quality of the nation's groundwater and surface water resources, hearing held in Hartford, CT, June 13, 1986

6. National Ground Water Contamination Research Act : hearing before the Subcommittee on Water and Power Resources of the Committee on Interior and Insular Affairs, House of Representatives, One Hundredth Congress, first session on H.R. 791, to authorize the water resources research activities of the United States Geological Survey, and for other purposes : hearing held in Washington, DC, February 26, 1987

7. National Ground Water Contamination Research Act : hearing before the Subcommittee on Water and Power Resources of the Committee on Interior and Insular Affairs, House of Representatives, One Hundredth Congress, first session on H.R. 791 to authorize the water resources research activities of the United States Geological Survey, and for other purposes, hearing held in Washington, DC, February 26, 1987

8. The National Ground Water Research Act of 1989 : joint hearing before the Subcommittee on Natural Resources, Agriculture Research, and Environment of the Committee on Science, Space, and Technology, and the Subcommittee on Department Operations, Research, and Foreign Agriculture of the Committee on Agriculture, U.S. House of Representatives, One Hundred First Congress, first session, August 2, 1989, October 3, 1989 ...

9. The National Ground Water Research Act of 1989 : joint hearing before the Subcommittee on Natural Resources, Agriculture Research, and Environment of the Committee on Science, Space, and Technology, and the Subcommittee on Department Operations, Research, and Foreign Agriculture of the Committee on Agriculture, U.S. House of Representatives, One Hundred First Congress, first session, August 2, 1989, October 3, 1989 ....

18. Nation's ground water protection : oversight hearing before the Subcommittee on General Oversight and Investigations of the Committee on Interior and Insular Affairs, House of Representatives, One Hundredth Congress, second session ... hearing held in Washington, DC, May 26, 1988

19. Nation's ground water protection : oversight hearing before the Subcommittee on General Oversight and Investigations of the Committee on Interior and Insular Affairs, House of Representatives, One Hundredth Congress, second session, on nation's ground water protection : hearing held in Washington, DC, May 26, 1988

33. New discoveries in agrochemicals

62. North Carolina