Philippine Science and Mathematics Education Studies:  Vol 1, Number 1/ 
Belen, Josefina G.  
 - Quezon City:  Institute of Science and Mathematics Education Development University of the Philippines,  1999. 
 - x, 116p.:  illustration 
<br/><br/><label>ISBN: </label>01196928 
<br/><br/><label>Dewey Class. No.: </label>M 500 P522 1999