Das,P.N. <br/><br/>
Oru thulli velichem / 
P.N.Das 
 - 2nd ed. 
 - Kozhikode :  Mathrubhumi books,  2013. 
<br/><br/><br/>In Malayalam 
<br/><br/><label>ISBN: </label>9788182658714 
<br/><br/><label>Subjects--Index Terms: </label>Philosophy