Classifying educational programmes :  Manual for ISCED-97 implementation in OECD countries (preleminary version of the forthcoming publication) 

 - Paris: OECD, 1999.  OECD,  1999. 
 - 134 p. 
<br/><br/><label>No. de Clasificación Universal Decimal: </label>OC 37: 005 (100) =20 "1999" CLA.