Clean air act extension.
Subtitle: Hearing, Ninety-third Congress, first session on H.R. 4291, H.R. 4673, and S. 498 ...
By: February 28, 1973.
Publisher: U.S. Govt. Print. Off.
Published: 1973
Place of publication: Washington
Language: eng
Number of pages: 87
Subjects: Air -- Pollution -- Law and legislation -- United States.
Notes: "Serial no. 93-21."