59
Argitaratua 2002
Full text available from Canadian Business & Current Affairs Database: 06/01/2012 to present
Government Document Baliabide elektronikoa Aldizkako argitalpena
60
Argitaratua 1948
Full text available from UK & Ireland Database: 04/01/2007 to present
Baliabide elektronikoa Aldizkako argitalpena