author
German : the German language in education in Alsace, France / compiled Alie van der SchaafCatalan : the Catalan language in education in Catalonia, Spain / [established by Maria Areny and Alie van der Schaaf ; contrib. by Miquel Strubell ... et al.]Frisian : the Frisian language in education in the Netherlands / [extended and adapted by Jehannes Ytsma and Alie van der Schaaf]