Air quality criteria for particulate matter. 

 - Washington  1969. 
 - 1 v. (various pagings)  illus.  26 cm. 
 - Its Publication .
 - National Air Pollution Control Administration publication  no. AP-49. .
<br/><br/>Includes bibliographies. 
<br/><br/><label>LCCN: </label>75601265 //r89 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Air quality--Standards.
<br/><br/><label>LC Class. No.: </label>TD 881  / .U56 
<br/><br/><label>Dewey Class. No.: </label>628/.53/2