New Unesco source book for science teaching. 

 - Tokyo :  C. Tuttle,  1973. 
 - 270 p. :  illus. ;  23 cm. 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>9231010581 
<br/><br/><label>LCCN: </label>74150700  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Study and teaching.<br/>Science--Experiments--Juvenile literature.