TY  - BOOK
ED  - Papua New Guinea. Department of Education.
TI  - Trial workbooks for grade 9: 9.8 number machines
PY  - 1982///
CY  - Port Moresby
PB  - Department of Education
KW  - Mathematics
KW  - Study and teaching
KW  - Papua New Guinea
N1  - Cover title
ER  -