Harris,James C. <br/><br/>
Intellectual disability:understanding its development causes,classification evaluation and treatment 

 - New York  Oxford university press  2006 
 - 429p 
<br/><br/><label>ISBN: </label>9780195178852 
<br/><br/><label>LC Class. No.: </label>SBL RC 570  / .H37 2006