Air quality data :  1978 first quarter statistics 

 - Washington, D.C. :  U.S. Environmental Protection Agency,  1978 
 - vii, 125 p. ;  28 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Air--Pollution<br/>Air quality management
<br/><br/><label>Dewey Class. No.: </label>363.7392