Ayres, Frank. <br/><br/>
Theory and problems of plane and spherical trigonometry / 
Ayres, Frank. 
 - New York :  McGraw-Hill,  c1954. 
<br/><br/>
<br/><br/><br/>english 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry
<br/><br/><label>Dewey Class. No.: </label>516.24/AYT