Manual on terminology and classification in mental retardation 
editor : Herbert J. Grossman ; editorial board, Michael J. Begab ... [et al.]. 
 - 1977 revision. 
 - Washington  American Association on Mental Deficiency  c1977. 
 - xii, 204 p. 
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 111-112. 
<br/><br/><label>LCCN: </label>77087576 //r84 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mental Retardation--Classification.<br/>Mental Retardation--Terminology.
<br/><br/><label>LC Class. No.: </label>RC570  / .M26 1977 
<br/><br/><label>Dewey Class. No.: </label>616.8/588/0012