Tredgold, A. F. <br/><br/>
Tredgold's mental retardation. 

 - 11th ed. 
 - Baltimore,  Williams and Wilkins  [1970 
 - xi, 490 p.  illus. 
<br/><br/> First ed., 1908, has title: Mental deficiency (amentia) 
<br/><br/><label>ISBN: </label>0702002879 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mental retardation.
<br/><br/><label>LC Class. No.: </label>MED RC570  / .T73