Ravindran, P. K. <br/><br/>
Niramulla pareekshanangal / 
by P. K. Ravindran 
 - Thrissur :  Kerala Sastra Sahitya Parishad,  2011,  2017. 
<br/><br/><br/>In Malayalam 
<br/><br/><label>ISBN: </label>9789380512815 
<br/><br/><label>Subjects--Index Terms: </label>Chemistry