Ingalls, Robert P., <br/><br/>
Mental Retardation : 

 - New York :  Wiley,  c1978. 
 - xiv, 491 p. :  ill. ; 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0471427160 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mental retardation<br/>People with mental disabilities<br/>Children with mental disabilities<br/>Mental retardation.<br/>Education of mentally retarded.
<br/><br/><label>LC Class. No.: </label>MED RC570  / .I4