Soddy K., Tredgold R. F., Tredgold A. F. <br/><br/>
Tredgold's Textbook of mental deficiency   subnormality 

 - 10th ed. 
 - London  Bailliere, Tindall  1963 
 - 530 p.  22 cm. 
 -   .
<br/><br/>  Originally authored by : A. F. Tredgold 
<br/><br/>  Mental Retardation 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mental Retardation
<br/><br/><label>Dewey Class. No.: </label>WM300  / TRE