Pacific Science Series: 3b 

 - Singapore:  Pan pacific,  1979. 
 - 44p.;  26cm 
<br/><br/><label>ISBN: </label>9971-63-009-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Primary Education
<br/><br/><label>Dewey Class. No.: </label>372.35  / PAC