Sankaran Unni K,  <br/><br/>
Paristhiti Vijnanathinte Moolatauthwangal 

 - Thiruvananthapuram  STATE INSTITUTE OF LANGUAGE  1976 
 - 218p. 
<br/><br/><label>Subjects--Uniform Titles: </label>--general stack 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Natural sciences & mathematics--EcologyGeneralia--Life sciences; biology
<br/><br/><label>Dewey Class. No.: </label>577  / SAN-P