Sharma, P. D. <br/><br/>
Elements of ecology 

 - Meerut  Rastogi Publication    1975 
 - 303 
<br/><br/><label>Subjects--Topical Terms: </label><br/>  Biology<br/>  Ecology
<br/><br/><label>Dewey Class. No.: </label>574.5  / S531e