TY  - BOOK
AU  - Clements,M.A.
ED  - Papua New Guinea University of Technology
TI  - Careless errors made by sixth-grade children on written mathematical tasks
T2  - Report
PY  - 1980///
CY  - Lae
PB  - Mathematics Education Centre, Papua New Guinea University of Technology
KW  - Mathematics
KW  - Study and teaching (Elementary)
KW  - Error analysis
N1  - Bibliography : p.10-11
ER  -