Kells, Lyman Morse. <br/><br/>
Plane and spherical trigonometry / 
by Lyman M. Kells, Willis F. Kern and James R. Bland. 
 - 3rd ed. 
 - New York :  McGraw-Hill,  c1951. 
 - xi, 290 p. :  ill. 
<br/><br/> Includes index and answers: (p. 369-401) to exercises. 
<br/><br/><label>LCCN: </label>93013076     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry--Study and teaching (Higher).<br/>Trigonometry--Problems, exercises, etc.<br/>Plane trigonometry<br/>Spherical trigonometry