Deva Rajan, C.N. <br/><br/>
වාණිජ අංක ගණිතය 
 Vaanija anka ganithaya 

 -  Official langues  1963 
 - 428p.,  21 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Commercial arithmatic <br/>Mathematics
<br/><br/><label>Universal Decimal Class. No.: </label>511  / DEV