Kotpal, R L; Bali, N P <br/><br/>
Concepts of biology 

 - 2 
 -  Vishal Publications, Delhi  1978 
 - 301 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biology
<br/><br/><label>Dewey Class. No.: </label>574  KOT-C2