Sivasankaran, M. <br/><br/>
Prakrithiyude thakkol 

 - 
 - Thrissur  Kerala  Sastra Sahitya Parishad  2006 
 - 324p.   
<br/><br/>   
<br/><br/><label>ISBN: </label>81-88033-38-3 
<br/><br/><label>ISSN: </label>
<br/><br/><label>Subjects--Index Terms: </label>Popular Science  Nature 
<br/><br/><label>Dewey Class. No.: </label>608.1P=M