Bilingualism across the lifespan :  aspects of acquisition, maturity, and loss / 
edited by Kenneth Hyltenstam and Loraine K. Obler. 
 - Cambridge ;  New York :  Cambridge University Press,  1989. 
 - xi, 249 p. :  ill. 
<br/><br/><label>ISBN: </label>0521352258 
<br/><br/><label>LCCN: </label>93035126     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Bilingualism.<br/>Language acquisition.