Environment contamination and hygiene  

 - New Delhi:   Jagmander Book Agency,   1991 
 - 196p.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environment 
<br/><br/><label>Subjects--Index Terms: </label>Science  
<br/><br/><label>Universal Decimal Class. No.: </label>612.019:613  / N1