TY  - BOOK
AU  - Tredgold,R.F.
AU  - Soddy,Kenneth
TI  - Tredgold's textbook of mental deficiency
U1  - 616.85 
PY  - 1963///
CY  - London
PB  - Balliere, Tindall & Cox Ltd
KW  - Mental retardation
KW  - Mental illness
ER  -