TY  - BOOK
T1  - Mathematical understanding :selected results from the secondary assessment of mathematics /
DA  - 1979.
CY  - [Washington :
CN  - QA11.N3
CN  - QA11.N3
PB  - Dept. of Health, Education, and Welfare,
PP  - [Washington :
PY  - 1979.
ID  - 20180
KW  - Mathematical ability.
TI  - Mathematical understanding :selected results from the secondary assessment of mathematics /
ER  -