Ayyar, L. A. N. <br/><br/>
Indiayile ratnangal / 
L. A. N. Ayyar; by T. Sudhakara Menon and Thyagarajan R. 
 - Thiruvananthapuram :  Kbi,  1974. 
<br/><br/><br/>In Malayalam 
<br/><br/><label>Subjects--Index Terms: </label>Geology Mineralogy Percian Stone