Sultan Mahmud. <br/><br/>
Plane trigonometry / 
Sultan Mahmud. 
 - 2nd rev ed.  
 - Dhaka :  East bengal Publishers,  1963. 
 - xii, 318 p. :  ill. ;  18 cm. 
<br/><br/>341  341 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry.
<br/><br/><label>Dewey Class. No.: </label>514.5 / S59p