ගණිත වගු 
 Ganitha vagu 

 -  Education depatment 
 - 11p.,  21 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonametric function <br/>Logarithms <br/>Mathematical table
<br/><br/><label>Universal Decimal Class. No.: </label>518.2  / GAN