Smith, Robert McNeil. <br/><br/>
An introduction to mental retardation 
Robert M. Smith. 
 - New York  McGraw-Hill  [1971] 
 - xii, 272 p.  illus. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>ISBN: </label>
<br/><br/><label>LCCN: </label>79137131  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mentally handicapped