Nondegradation policy of the Clean air act.  Hearing, Ninety-third Congress, first session. 
July 24, 1973. 
 - Washington  U.S. Govt. Print. Off.  1973. 
 - iii, 418 p.  illus.  23 cm. 
<br/><br/> "Serial no. 93-H16." 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>LCCN: </label>73603016  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Air--Pollution--Law and legislation--United States.<br/>Air Pollution--prevention & control--United States.
<br/><br/><label>LC Class. No.: </label>KF26  / .P825 1973d 
<br/><br/><label>Dewey Class. No.: </label>301.31 
<br/><br/><label>National Library of Medicine Call No.: </label>WA 754  / U511n 1973 
<br/><br/><label>Gov. Doc. Class. No.: </label>Y 4.P 96/10:93-H 16