Das, B.C. . <br/><br/>
Intermediate Trigonometry /  Textual Documents 
B.C.Das & B.N.Mukherjee. 
 - 18th / 
 - Calcutta :  U. N. Dhur & Sons Pvt. Ltd. ,  1957. 
 - 144p. :  ill ;  22cm. . 
<br/><br/><label>ISBN: </label>81-85624-85-2 
<br/><br/><label>Subjects--Index Terms: </label>Mathematics Trigonometry G-Mathematics Trigonometry T/G-Mathematics 
<br/><br/><label>Dewey Class. No.: </label>514  / D 26 In