Proceedings of the second international meeting on 21st century studies: volume IV: national studies-Europe (United Kingdom, Ireland, Iceland, Portugal, Poland, European environmental policies) 

 - Paris :  UNESCO,  1989. 
 - 268 p. 
 - Studies and documents. Major Programme I. Reflection on wor- .
<br/><br/><label>No. de Clasificación Universal Decimal: </label>369.1 "313" (4)=20 PRO No.55.