Das,B.N. <br/><br/>
Intermediate Trigonometry  
by B.N.Das and B.N.Mukherjee 
 - 45th Edition  
 - Kolkata   U.N.Dhur & Sons Private Limited   1933 
 - A-104p. 
<br/><br/><label>ISBN: </label>8185624852 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics 
<br/><br/><label>Dewey Class. No.: </label>516.24  / DAS