Gonzalvo, Romellen T. ; <br/><br/>
Contemporary Mathematics/ 
Gonzalvo, Romellen T. ; 
 - Manila;   Purely Books Trading And Publishing Corp. ;  [2013]; 
<br/><br/><label>ISBN: </label>978-971-95338-9-4 
<br/><br/><label>Dewey Class. No.: </label>510