Effluent guidelines and standards 

 - United States :   EPA,   1994. 
 - p.v.; 23cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>EFLUENTES INDUSTRIALES<br/>NORMALIZACION
<br/><br/><label>Universal Decimal Class. No.: </label>628.5 [083.74]