Pacific Science Series: 5b 

 - Singapore:  Pan Pacific Publications Ltd,  1976. 
 - 59p.;  26cm 
<br/><br/><label>ISBN: </label>9971 63 064 8 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Primary Education
<br/><br/><label>Dewey Class. No.: </label>372.35  / PAC