TY  - BOOK
AU  - Deregowski,Jan B.
TI  - Difficulties in pictorial perception in Africa / 
PY  - 1966///
CY  - Lusaka : 
PB  - Human Development Research Unit, 
KW  - Picture-writing
KW  - Africa
KW  - testing
KW  - Picture interpretation tests
KW  - Perception
ER  -