The world of learning 1978-79/ 

 - 29 ed. 
 - London  Europa publications limited:  c1978. 
 - xv,2038p.: 
<br/><br/> Includes index and reference 
<br/><br/><label>ISBN: </label>0905118251 
<br/><br/><label>Dewey Class. No.: </label>370.5