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

 - 25th /   1933. 
 - Calcutta:  U.N Dhur& Sons Pvt.Ltd,  1933. 
 - 288p. 
<br/><br/><label>Subjects--Personal Names: </label><br/>Mathematics, Geometry. 
<br/><br/><label>Dewey Class. No.: </label>516.24