Diploma in special education (mental retardation ): notes on topics of paper - I mental retardation - nature & needs  / 
National Institute for the mentally handicapped. 
 - Andhra Pradesh:  National Institute for the mentally handicapped, 
 - 126p.; 24cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>218 
<br/><br/><label>Dewey Class. No.: </label>371.9 DIP