Practice and progress :  An integrated course for pre-intermediate studens 

 - LondonMFN  015944 London :  Longman,  1976 
 - 232p.;  24 cm. 
 - New concept english;  2 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Curso<br/>Ingleés
<br/><br/><label>Universal Decimal Class. No.: </label>420  -5  (07)