Richards B. W. <br/><br/>
Mental subnormality  modern trends in research 

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 - London  Pitman Medical and Scientific Publishing  1970 
 - 260 p.  23 cm. 
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<br/><br/>  Mental Retardation, Mental Disorders, Research 
<br/><br/><label>ISBN: </label>0345567890X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Research<br/>Mental Disorders<br/>Mental Retardation
<br/><br/><label>Dewey Class. No.: </label>WM300  / RIC