Thesaurus européen d'éducation Councll of Europe; REDINED éducation; learning; Education Thesaurus 2003-12-31 2014-09-03 12:51:02 fr mathématiques nouvellesmathématiques modernes matemàtiques modernes Neue Mathematik new mathematics matemáticas modernas matematika modernoa matemáticas modernas nuova matematica Matemática moderna 2008-08-22 15:14:55