Working groups on :  mental deficiency, 3-6 November, 1980. 

 - [Vatican Italy] :  Pontificia Academia Scientiarvm,  [1981] 
 - Pontificiae Academiae Scientiarum scripta varia ;  no. 47 .
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mental retardation.<br/>Mental illness.