Ek, Jan Ate Van <br/><br/>
Threshold level english : in a European unit/credit system for modern language learning by adults 

 - Oxford  Pergamon Press  1980 
 - 253 p 
<br/><br/><br/>Inglés 
<br/><br/><label>ISBN: </label>0-08-024588-9 
<br/><br/><label>Subjects--Topical Terms: </label><br/>INGLES-ESTUDIO Y ENSEÑANZA; METODOLOGIA/REVISADO/