Sparks, Fred W. <br/><br/>
Plane trigonometry / 
Fred W. Sparks, Paul K. Rees 
 - Rev. ed. 
 - New York :  Prentice-Hall,  1947 
 - ix, 179p. :  ill. ;  23 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry
<br/><br/><label>Dewey Class. No.: </label>514  / SPA