Butler, Charles <br/><br/>
Trigonometry for secondary school 

 - 2 
 - Boston, Estados Unidos de América :  Heath and company,   1957 
 - 360p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometría Plana
<br/><br/><label>Dewey Class. No.: </label>516.34  / B985t