Garg S. K. <br/><br/>
Sewage disposal and air pollution engineering / 

 - 7th ed. 
 - Khenna Publishers,  Khenna Publishers,  c1990 
 - 597 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>NA 
<br/><br/><label>LC Class. No.: </label>D247 
<br/><br/><label>Dewey Class. No.: </label>363.728