Fourth sociolinguistic survey 2006 / [Executive Committee Patxi Baztarrika Galparsoro...(et al.)]

Vitoria-Gasteiz : Eusko Jaurlaritzaren Argitalpen Zerbitzu Nagusia = Servicio Central de Publicaciones del Gobierno Vasco , 2008

EIFE 2, influence of factors on the learning of basque : study of the models A, B and D in fifth year Basic General Education / [authors, J. Sierra and I. Olaziregi]

Gasteiz : Central Publications Service of the Basque Government , 1989