Swokowski, Earl W.  1926- <br/><br/>
Fundamentals of trigonometry / 
Earl W. Swokowski 
 - 4th ed. 
 - Boston, Mass.  :  Prindle, Weber & Schmidt,  1978 
 - 338 p. :  ill. ;  25  cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>0871502542 
<br/><br/><label>LCCN: </label>77-26265 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry, Plane