World of learning 1979-80 
/ Europa Publication Limited 
 - 30th ed.  
 - London:   Europa Publication Limited,   1979 
 - 2061p.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education
<br/><br/><label>Subjects--Index Terms: </label>Science  International organization  
<br/><br/><label>Universal Decimal Class. No.: </label>R 37(4/9(058.7)   / L9