TY  - BOOK
AU  -  Derðegowski,Jan B.
AU  -  Serpell,Robert
TI  -  Performance on a sorting task with various modes of representation : :  a cross-cultural experiment / 
U1  -  PS 155.42 ZAM 
PY  - 1971///
CY  -  Lusaka : 
PB  -  Human Development Research Unit, University of Zambia, 
KW  -  Perception in children
KW  -  Cross-cultural studies
KW  -  Cognition and culture
KW  -  Zambia
KW  -  Scotland
KW  -  Child study
N1  -  Includes bibliographical references (leaves [20]-[21].)
ER  -