Das, B.C . <br/><br/>
Higher Trigonometry /  

 - Calcutta :   U.N.Dhur & Sons, Private Ltd.. 
 - vi, 272p ;  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics <Tigonometry>
<br/><br/><label>Dewey Class. No.: </label>B5  / K6