TY  - BOOK
AU  - Penrose, Lionel S
TI  - Mental Defect
U1  - 156.3 
PY  - 1951///
CY  - London
PB  - Macmillan
KW  - General Stack
KW  - Philosophy & psychology
KW  - psychologyComparative psychology
KW  - Zoology
ER  -