Pacific Science Series : 6b 

 - Singapore:  Pan Pacific Publications Pvt Ltd,  1976. 
 - 63p.;  col.ill.;  26 cm. 
<br/><br/><label>ISBN: </label>9971 63 066 4 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Primary Education
<br/><br/><label>Dewey Class. No.: </label>372.35  / PAC