Bernal, J. D. <br/><br/>
Sastram charithrathil v. iii / 
J. D. Bernal; translated by M. C. Namboothirippadu 
 - 3rd ed. 
 - Kochi :  Kerala Sastra Sahitya Parishad,  2007. 
<br/><br/><br/>In Malayalam 
<br/><br/><label>Subjects--Index Terms: </label>General Science History