RAMACHANDRA PANICKER, K.G. SANKARANARAYANAN, P.K. <br/><br/>
VIDYAABHYAASA MANASAASTHRAVUM SISU VIKASANAVUM 

 - 4th Ed. 
 - Kottayam  Vidyarthimithram Book Depot, Kottayam   1993 
<br/><br/><label>Dewey Class. No.: </label>370.15  / RAM/V.M