Pacific Science Series:2b 

 - Singapore:  Pan Pacific,  1976. 
 - 52p.;  29cm 
<br/><br/><label>ISBN: </label>9971 63 008 7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Primary Education
<br/><br/><label>Dewey Class. No.: </label>372.35  / PAC