TY  - BOOK
ED  - Proceedings of symosia (4-5 : 31-1-and  : Middlesex)
TI  - Learning, speech and thought in the mentally retarded ed by A D B Clarke and M M Lewis
U1  - S62:4-682p73,N69, L2 
PY  - 1972///
CY  - London
PB  - Butterworths       
KW  - PSYCHOLOGY
ER  -