Gupta, R. D. <br/><br/>
Environmental studies 

 - 1st ed. 
 - Meerut  R. Lall Book Depot  2009 
 - xii,291p.;  21cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental science
<br/><br/><label>Dewey Class. No.: </label>333.7  / GUP