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 
 - Second Edition 
 - New York  McGraw Hill Book Company, Inc.  1940 
 - xv, 401 pages, 23 cm. 
<br/><br/> includes appendix & index 
<br/><br/><label>Dewey Class. No.: </label>516.242 K29 1942