Economic impact of air pollution controls on gray iron foundry industry 

 - Washington :   U.S. Government Printing Office,   1970. 
 - 124 p. 
 - National Air Pollution Control Administration Publication Nš AP-74 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>CONTAMINACION DEL AIRE<br/>IMPACTO ECONOMICO<br/>FUNDICION DEL HIERRO
<br/><br/><label>Universal Decimal Class. No.: </label>628.5:669.1