6
Argitaratua 1998
Full text available from ABI/INFORM Global: 03/01/2002 to 09/30/2003
Baliabide elektronikoa Aldizkaria
9
Argitaratua 1997
Full text available from Accounting & Tax Database: 11/01/2006 to 07/31/2010
Baliabide elektronikoa Aldizkaria