Rider, Paul R. <br/><br/>
Plane and spherical trigonometry / 
Paul R. Rider. 
 - New York,  The Macmsan company,  ©1969. 
 - xiv, 142 pages ;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry.
<br/><br/><label>LC Class. No.: </label>QA531  / .R52 1969