ASTHANA , D.K. <br/><br/>
ENVIROMENT : PROBLEMS AND SOLUTIONS  

 - NEW DELHI  S.CHAND & COMPANY  2006 
 - 434:  22CM. 
<br/><br/><label>Subjects--Index Terms: </label>Environmental Science 
<br/><br/><label>Dewey Class. No.: </label>363.7 AST