TY  - BOOK
AU  - Gerdes,Paulus
TI  - Sona geometry: reflections on the tradition of sand drawings in Africa south of the equator. 
AV  - QA440 
PY  - 1994///
CY  - Maputo
PB  - Instituto Superior Pedag�aogico
KW  - Ethnomathematics
KW  - Mozambique
KW  - Africa
N1  - Includes bibliographical references
ER  -