TY  - BOOK
T1  - Understanding and teaching elementary school mathematics.
DA  - c1966.
CY  - New York,
AU  - Rappaport, David.
CN  - QA135.5
CN  - QA135.5
PB  - Wiley
PP  - New York,
PY  - c1966.
ID  - 56328
KW  - Arithmetic
KW  - Mathematics
TI  - Understanding and teaching elementary school mathematics.
ER  -