Special urban air pollution problems, Denver and Houston : hearings before the Subcommittee on the Environment and the Atmosphere of the Committee on Science and Technology, U.S. House of Representatives, Ninety-fifth Congress, first session, November 19, 21, 1977.
United States.Congress.House.Committee on Science and Technology.Subcommittee on the Environment and the Atmosphere.
Washington : U.S. Govt. Print. Off.,
1978.
"No. 52."
Includes bibliographical references.
Air
Air