Niles, Nathan O. <br/><br/>
Plane Trigonometry 

 - New York:  John & Wiley,  1961. 
 - 234p.;  23cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geometry
<br/><br/><label>Dewey Class. No.: </label>516.24  / NIL