Water and Air Pollution Control: Hearings before a Subcommittee of the Committee on Public Works, United States Senate, Eighty Fourth Congress, First Session, on S. 890, a Bill to Extend and Strengthen the Water Pollution Control Act and S. 928, a Bill to Amend the Water Pollution Control Act in Order to Provide for the Control of Air Pollution, April 22, 25, and 26, 1955

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