Lightfoot, David, <br/><br/>
The development of language :  acquisition, change, and evolution / 
David Lightfoot. 
 - Malden, Mass. :  Blackwell Publishers,  1999. 
 - xii, 287 p. ; 
<br/><br/><label>ISBN: </label>0631210598 (alk. paper) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Linguistic change.---
<br/><br/><label>Dewey Class. No.: </label>401.93 L6268 De