Systems development in adult language learnings   : a European unit-credit system for modern language learning by adults 
/ by J.L.M. Tim, R. Richterich JA Van Ek and DA Wilkins ; prepared for the Council of Europe  
. - New York  : Pergamon Press, 1980
. - 146 p.  ; 25 cm. 
 - Pergamon Institute of English, Oxford .
<br/><br/><label>ISBN: </label>0080245862 
<br/><br/><label>Source: </label> Don britannique 
<br/><br/><label>Universal Decimal Class. No.: </label>800.7