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

 - 25th. 
 - Calcutta:  U. N. Dhur & Sons Pvt. Ltd. 
 - 288p. 
<br/><br/><label>Subjects--Personal Names: </label><br/>Mathematics., Trigonometry . 
<br/><br/><label>Dewey Class. No.: </label>516.24