Tredgold's Mental retardation 

 - London:  Bailliere tindall,  1979. 
 - 384p.;  26 cm 
<br/><br/><label>ISBN: </label>0-7020-0684-x 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Medical Sciences<br/>mental illness
<br/><br/><label>Dewey Class. No.: </label>616.8588  / TRE