Thesaurus européen d'éducation Councll of Europe; REDINED éducation; learning; Education Thesaurus 2003-12-31 2014-09-03 12:51:02 fr pensée opératoire formelle pensament operatori formal Formales operatorisches Denken formal operational thinking pensamiento operatorio formal pentsamendu operazional formala pensamento operatorio formal pensiero operatorio formale Pensamento operacional formal 2008-08-22 15:14:55