TY  - BOOK
AU  -  Tredgold R. F., Soddy K., Tredgold A. F.
TI  - Textbook of mental deficiency
U1  - WM300 
PY  - 1956///
CY  - London
PB  - Bailliere, Tindall and Cox
KW  - Mental Disorders
KW  - Mental Retardation
N1  -  First compiled by the late in : A. F. Tredgold
N2  -  Mental Retardation, Mental Disorders
ER  -