P. D. Sharma <br/><br/>
Ecology and environment 

 - India  Rastogi publications  2005 
 - 660 p. 
<br/><br/><label>ISBN: </label> 190 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geography
<br/><br/><label>Dewey Class. No.: </label>577  / SHA-E