Tredgold, Alfred Frank,  1870-1952. <br/><br/>
Tredgold's mental retardation/ 
R. F. Tredgold and K. Soddy. 
 - 11th ed., 
 - London :  Baillière, Tindall & Cassell,  1970. 
 - 490 p., 26 plates. :  illus., ports. ;  25 cm. 
<br/><br/> First published in 1908 under title: Mental deficiency (amentia). 
<br/><br/>Bibliography: p. [477]-486. 
<br/><br/><label>ISBN: </label>0702002879 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mental retardation<br/>Mental Retardation
<br/><br/><label>LC Class. No.: </label>WM300 
<br/><br/><label>Dewey Class. No.: </label>616.85/88