Nondegradation policy of the Clean air act.
Subtitle: Hearing, Ninety-third Congress, first session.
By: July 24, 1973.
Publisher: U.S. Govt. Print. Off.
Published: 1973
Place of publication: Washington
Language: eng
Number of pages: 418
Subjects: Air -- Pollution -- Law and legislation -- United States.
Notes: Includes bibliographical references.
"Serial no. 93-H16."