Universidad Pedagógica Nacional Unidad Ajusco Catálogo de la Biblioteca "Gregorio Torres Quintero"
by Sri Lanka. Ministry of Education and Higher Education.
by Austria. Federal Ministry of Education and Arts | OECD. Organisation for Economic Co-operation and Development (Francia).
by Dinamarca. Ministry of Education and Research.
by Hungría. Ministry of Education and Culture.
by International conference on education (44 th : 1994 : Geneva).
by Setényi, János, edit | Hungría. Ministry of Education and Culture.