Kells, Lyman M. <br/><br/>
Plane and spherical trigonometry / 
Lyman M. Kells, Willis F. Kern, James R. Bland 
 - 3rd ed. 
 - [Mandaluyong City]:  National Book Store, [distributor],  c1978 
 - ix, 290p. 
<br/><br/> Originally published: McGraw-Hill, 1951 
<br/><br/><label>ISBN: </label>971-08-1917-8 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry
<br/><br/><label>Dewey Class. No.: </label>516.24 K29 1978