Niles, Nathan O. <br/><br/>
Plane Trigonometry / 
Nathan O. Niles. 
 - 2nd  ed. 
 - New York,  London,  John Wiley,  c1968. 
 - xv, 282 p. :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plane trigonometry.
<br/><br/><label>Dewey Class. No.: </label>514.5  / NIL