Clean air act amendments of 1977 : hearings before the Subcommittee on Health and the Environment of the Committee on Interstate and Foreign Commerce, House of Representatives, Ninety-fifth Congress, first session, on H.R. 4151 and H.R. 4758 ... H.R. 4444 (and all identical bills) ..

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United States. Congress. House. Committee on Interstate and Foreign Commerce. Subcommittee on Health and the Environment

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