Das,B.C. <br/><br/>
Higher Secondary Trigonometry  
by B.C.Das and B.N.Mukherjee 
 - 16th Edition  
 - Calcutta  U.N.Dhur & Sons Private Limited   1976 
 - xiii,144p. 
<br/><br/><label>ISBN: </label>8185624887 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics 
<br/><br/><label>Dewey Class. No.: </label>510  / DAS