TY  - BOOK
AU  -  Soddy K., Tredgold R. F., Tredgold A. F.
TI  - Tredgold's Textbook of mental deficiency : subnormality
U1  - WM300 
PY  - 1963///
CY  - London
PB  - Bailliere, Tindall
KW  - Mental Retardation
N1  -  Originally authored by : A. F. Tredgold
N2  -  Mental Retardation
ER  -