Corlis, John J.  <br/><br/>
Plane trigonometry / 
John J. Corlis and Winifred V. Berglund. 
 - 2nd ed. 
 - Boston :  Houghton mifflin company.  c 1958. 
 - xii, 397 p. :  ill. ;  22 cm. 
<br/><br/> Includes index. 
<br/><br/>340  340 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plane trigonometry.
<br/><br/><label>Dewey Class. No.: </label>514.5 / C813p