Harley, Birgit, ed. <br/><br/>
The development of second language proficiency 

 - 3rd ed. 
 - Cambridge :  Cambridge Univ. Press,  1994 
 - 248 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>LANGUAGE AND LANGUAGES--STUDY AND TEACHING--CONGRESSES<br/>SECOND LANGUAGE ACQUISITION--CONGRESSES
<br/><br/><label>LC Class. No.: </label>P51  / H374D 1994