Gopal,B. <br/><br/>
Elements of ecology 

 - New Delhi :  Vikas  Publishing House Pvt.Ltd,  1979 
 - 199p.;  22cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social Sciences
<br/><br/><label>Dewey Class. No.: </label>304.2  / GOP