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.  1951 
 - xi, 290 pages, 23 cm. 
<br/><br/> include appendix 
<br/><br/><label>Dewey Class. No.: </label>516.24 K29 1951