TY  - BOOK
AU  - Otaala,Barnabas
TI  - The development of operational thinking of primary children: an exam ination of some aspects of Piaget`s theory amongo the Iteso children of Uganda / 
U1  - 155.4 
PY  - 1973///
CY  - New York : 
PB  - Columbia College , 
KW  - Constructivism (Psychology)
KW  - Child psychology
KW  - Africa
ER  -