Basic algebra and spherical trigonometry / 
Maria Rosario C. Exconde ; Lilibeth D. Sabinio ; Romel L. Marquez ; Ira A. Fajardo 
 - Quezon City :  MaxCor Publishing House, Inc.,  2013. 
 - 181 p.; 25.4cm. 
<br/><br/>includes appendix, references 
<br/><br/><label>ISBN: </label>9789710167142 
<br/><br/><label>Dewey Class. No.: </label>Fil 512 B311 2013