Ingalls, Robert P.,  1945- <br/><br/>
Mental retardation :  the changing outlook / 
Robert P. Ingalls 
 - New York :  Wiley,  1978 
 - xiv, 491 p. :  ill. ;  24 cm. 
<br/><br/> Includes index 
<br/><br/>Bibliography: p. 453-481 
<br/><br/><label>ISBN: </label>0471427160 
<br/><br/><label>LCCN: </label>77-23359 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mental deficiency--Etiology<br/>Mentally handicapped--Care and treatment<br/>Mentally handicapped children--Education<br/>Intelligence tests<br/>Mental retardation<br/>Education of mentally retarded