Bera, Ajit Kumar <br/><br/>
Environmental Concept / 
by Ajit Kumar Bera 
 - Calcutta:  New Central Book Agency,  2001 
 - p.179 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biology<br/>Ecology
<br/><br/><label>Dewey Class. No.: </label>577  / BER-E