. . . "Groundwater quality : hearing before the Subcommittee on Water Resources of the Committee on Public Works and Transportation, House of Representatives, One hundred first Congress, second session, April 25, 1990" . "Groundwater quality hearing before the Subcommittee on Water Resources of the Committee on Public Works and Transportation, House of Representatives, One hundred first Congress, second session, April 25, 1990"@en . . . . . . . . . "Groundwater quality hearing before the Subcommittee on Water Resources of the Committee on Public Works and Transportation, House of Representatives, One Hundred First Congress, second session, April 25, 1990"@en . . . . . . . . . .