New unesco source book for science teaching 

 - Paris  The Unesco Press  1973 
 - 270  Hb  27.7 
<br/><br/><label>ISBN: </label>92-3-101058-1 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>
<br/><br/><label>Dewey Class. No.: </label>375.5