Souvenir and abstracts 

 - Delhi  University of Delhi India         1991 
 - Vaious Pagination  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geography- Environment
<br/><br/><label>Dewey Class. No.: </label>U:(G:55), N1