Mental retardation : a manual for multi rehabilitation workers / 
National Institute for the mentally handicapped. 
 - Andhra Pradesh:  National Institute for the mentally handicapped,  2007. 
 - 55p.; 24cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>214 
<br/><br/><label>Dewey Class. No.: </label>371.9 MEN