Lloyd, Lyle L. <br/><br/>
Augmentative and alternative communication : 

 - Boston :  Allyn and Bacon,  c1997. 
 - xxiv, 615 p. :  ill. ; 
<br/><br/><label>ISBN: </label>0205198848 
<br/><br/><label>Dewey Class. No.: </label>616.85503  / LIO