Kells, Lyman M. , Kern, Willis, F & Bland, James R. <br/><br/>
Plane and Spherical Trigonometry  
By Lyman M. Kells, Willis F. Kern & James R. Bland 
 - Third Edition 
 - New York  McGraw Hill Book Company, Inc.  1978 
 - ix, 408 pages, 22 cm. 
<br/><br/> includes appendix & index 
<br/><br/><label>ISBN: </label>971-08-1917-8 
<br/><br/><label>Dewey Class. No.: </label>516.24 K28 C2