Patton, James R. <br/><br/>
Mental retardation. 

 - second edition. 
 - Columbus :  Charles E. Merrill,  1986. 
 - xi, 595pages. :  : illustrations. 
<br/><br/> Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>06752043604 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mental retardation.<br/>Mental retardation.