Sharma, P D <br/><br/>
Ecology and environment / 
by P D Sharma 
 - 6th ed. 
 - Meerut :  Rastogi publications,  1991 
 - 519p. : 
<br/><br/><label>ISBN: </label>8171331106 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology
<br/><br/><label>Dewey Class. No.: </label>574.5  / SHA/E