Europa Year Book :  A World Survey 

 - London :  Europa Publications Limited 
 - v. 
 - Anual 
<br/><br/> CAICYT  ULRICH'S  ISSN 
<br/><br/><label>ISSN: </label>0071-2302 
<br/><br/><label>Standard No.: </label>RELAP00085