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The Clean Water Act after 37 years : recommitting to the protection of the nations' waters : hearing before the Committee on Transportation and Infrastructure, House of Representatives, One Hundred Eleventh Congress, first session, October 15, 2009
- "The Clean Water Act after 37 years : recommitting to the protection of the nations' waters : hearing before the Committee on Transportation and Infrastructure, House of Representatives, One Hundred Eleventh Congress, first session, October 15, 2009"@en
- "The Clean Water Act after 37 years recommitting to the protection of the nations' waters : hearing before the Committee on Transportation and Infrastructure, House of Representatives, One Hundred Eleventh Congress, first session, October 15, 2009"@en