Smith, Robert McNeil. <br/><br/>
An introduction to mental retardation / 
by Robert M. Smith. 
 - New York :  McGraw-Hill,  1971 
 - xii, 272 p. :  illus. ;  23 cm. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>ISBN: </label>0070589038 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mentally handicapped.