J. A. Van Ek , J. L. M. Trim <br/><br/>
Threshold 1990/ 
J. A. Van Ek , J. L. M. Trim 
 -  Cambridge,  1998 
 - 192 pages 
<br/><br/><label>ISBN: </label>9780521567060 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Elt - books for teachers
<br/><br/><label>Dewey Class. No.: </label>428  / EK