Threshold level English
in a European unit/credit system for modern language learning by adults
de Jan Ate van Ek, Jan Ate van Ek · Publicada por primera vez en 1980
in a European unit/credit system for modern language learning by adults
de Jan Ate van Ek, Jan Ate van Ek · Publicada por primera vez en 1980
published for and on behalf of the Council of Europe by Pergamon Press · inglés
Published for and on behalf of the Council of Europe by Pergamon · inglés
1966
1977
1972
1998
1991
1977