Deskribapena
Argitaratua:Began with: Dec. 1972.
Alearen deskribapena:Latest issue consulted: 2008.
Deskribapen fisikoa:v. : ill. ; 24 cm.
Beginning with <1997/98> available also online via the World Wide Web in PDF format through Source OECD
Argitaratze maiztasuna:Biennial
ISSN:0376-6438
Sartu:Electronic full text access restricted to licenced organisations with IP address and password.