Locker, John. <br/><br/>
Numerical trigonometry / 
John Locker and Kenneth F. Klopfenstein. 
 - Colorado :  The Davies Group Publishers,  c1992. 
 - 216 pages :  Illustration ;  23 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>1888570156 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry.