Threshold level English : in a European unit / credit system for modern language learning by adult /

by Ek, Jan Ate van, Ek, Jan Ate van
Published 1980

The Threshold Level : for Modern Language Learning in Schools

by Ek, Jan Ate Van
Published 1977

Vantage /

by Ek, Jan Ate van, Ek, Jan Ate van, Trim, John Leslie Melville
Published 2001