Balakrishnan Nair, N <br/><br/>
Paristhithivijnanam 

 - Thiruvananthapuram  State Institute of Languages  1971 
 - 355p. 
<br/><br/><label>Subjects--Uniform Titles: </label>--General Stack
<br/><br/><label>Subjects--Topical Terms: </label><br/>Life Sciences--BiologyEcology--Generalia
<br/><br/><label>Dewey Class. No.: </label>577  / BAL-P