TY  - BOOK
AU  -  Ellis Norman R.
TI  - Handbook of mental deficiency: psychological theory and research
U1  - WM300 
PY  - 1963///
CY  - New York
PB  - McGraw-Hill Book 
KW  - Mental Disorders
KW  - Mental Retardation
N2  -  Mental Retardation, Mental Disorders
ER  -