Das, B.C. . <br/><br/>
Intermediate Trigonometry /  Textual Documents 
B.C.Das & B.N.Mukherjee. 
 - 44th ed. / 
 - Calcutta :  U. N. Dhur & Sons Pvt. Ltd. ,  1999. 
 - 296p. :  ill ;  22cm . 
<br/><br/><label>ISBN: </label>81-85624-85-2 
<br/><br/><label>Subjects--Index Terms: </label>G-Mathematics Trigonometry Intermediate Trigonometry G-Mathematics 
<br/><br/><label>Dewey Class. No.: </label>516.24  / Da 26 In