Singh, Y K. <br/><br/>
Environmental science   

 - New Delhi :   New Age International,   2006. 
<br/><br/><label>ISBN: </label>8122418481 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Life Sciences
<br/><br/><label>Dewey Class. No.: </label>628  / SIN