Progression & regression in language : sociocultural, neuropsychological, & linguistic perspectives 
edited by Kenneth Hyltenstam and Åke Viberg 
 - Cambridge  Cambridge University Press  1993 
 - xiii, 487 p. ; 23 cm 
<br/><br/> Papers presented at a conference held Aug. 1990, Botkyrka, Sweden. Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9780521438742 
<br/><br/><label>ISSN: </label>92046241 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Code switching (Linguistics) - Congresses<br/>Language acquisition - Congresses<br/>Language attrition - Congresses<br/>Linguistic change - Congresses
<br/><br/><label>Dewey Class. No.: </label>401.93 HYL