Crystal, David <br/><br/>
Language death 

 - New Delhi  Cambridge University Press  2000 
 - x, 198p.   
<br/><br/> Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9780521121750 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Language obsolescence