Tredgold, Alfred Frank, 1870- <br/><br/>
Tredgolds' mental retardation 
By Tredgold, Alfred Frank; Ed. by Michael Craft with eighteen contributors foreword by Kenneth Rawnsley 
 - 12th ed. 
 - London  Bailliere Tindall  1979 
 - 384 p. : ill. ; 26 cm. 
<br/><br/><label>ISBN: </label>070200684X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mental deficiency<br/>Mental retardation