O'Connor, N. <br/><br/>
The social problem of mental deficiency / 
N. O'Connor and J. Tiza rd 
 - New York:  Pergamon Press ,  1956 
 - 182p. :  illus.;  23cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mental deficiency--Great Britain.
<br/><br/><label>Dewey Class. No.: </label>362.3