World problems in the classroom / 
Unesco. 
 - Paris :  UNESCO,  c1981. 
 - 61 p. 
 - Educational studies and documents ;  no. 41 .
<br/><br/><label>ISBN: </label>9231018175 
<br/><br/><label>LCCN: </label>90043093     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education--Collections.