Ayres Frank <br/><br/>
Theory and problems of plane and spherical trigono 

 -  1954 
 - Schaum's Outline Series .
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry
<br/><br/><label>Dewey Class. No.: </label>B5, J4