Beukelman, David R. <br/><br/>
Augmentative & alternative communication:  Supporting children & adults with complex communication needs / 
David R. Beukelman 
 - [Place of publication not identifed] :  [publisher not identified],  c2013 
<br/><br/> Supporting children & adults with complex communication needs, Augmentative 
<br/><br/><label>ISBN: </label>9781598571967 
<br/><br/><label>LC Class. No.: </label>RC 429 .B48 2013