Kumar, Arvind <br/><br/>
Environmental challenges of the 21st century 
by Arvind Kumar 
 - 673p. 
<br/><br/><label>ISBN: </label>81 7648 406 7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>New Delhi--A P H Publishing Cor
<br/><br/><label>Dewey Class. No.: </label>363.7  / KUM/E