Niles, Nathan O. <br/><br/>
Plane trigonometry / 
Nathan O. Niles 
 - London :  Willey,  c 1959. 
 - xi, 234 p. :  ill. ;  22 cm. 
<br/><br/> Includes index. 
<br/><br/>310  310 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry.
<br/><br/><label>Dewey Class. No.: </label>514.5 / N59p