Rao, P.L. Diwakar (ed) <br/><br/>
Pollution control handbook 

 - Secunderabad  Utility  1990 
 - 369p 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pollution-Enviornmental aspects<br/>Social problems, welfare and services
<br/><br/><label>Dewey Class. No.: </label>363.73/RAO