Litong, Domingo,  c1995. <br/><br/>
Contemporary High School Mathematics / 
Litong, Domingo. 
 - rev.ed. 
 - Manila, Philippines :  Salesiana Publishers, Inc,  c1995. 
 - x,274p. :  illus. ; bibliography ;  25.4cm. 
<br/><br/><label>ISBN: </label>971-522-279-X