Geometry 
Villarmil, Ma. Mauricia L. 
 -  National Book Store.  1977 
 - xiii, 676 pages. 
<br/><br/>
<br/><br/><label>ISBN: </label>9-71082098-2 
<br/><br/><label>Dewey Class. No.: </label>F 516.1 V71g 1977