Gopinathan Nair, P. S. <br/><br/>
Jalam:  jeevajalam / 
by P. S. Gopinathan Nair 
 - 4th ed. 
 - Thrissur :  Kerala Sastra Sahitya Parishad,  2010. 
<br/><br/><br/>In Malayalam 
<br/><br/><label>Subjects--Index Terms: </label>Acquaculture Acquatic Ecology