Stumph, Jerry L. <br/><br/>
Trends in air pollution control regulations / 
Jerry L. Stumph and Robert L. Duprey 
 - Washington, D.C. :  U.S. Government Printing Office,  1969 
 - 33 p. ;  26 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Air--Pollution<br/>Air quality management
<br/><br/><label>Dewey Class. No.: </label>628.53