Nielsen, K. L. <br/><br/>
Plane and spherical trigonometry / 
K. L.Nielsen. 
 - New York:  ARNES & Noble,  c1943. 
 - 139 p.:  21 cm. 
<br/><br/>
<br/><br/><br/>English 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry
<br/><br/><label>Dewey Class. No.: </label>516.34/NIP