| 000 | 00320nam a2200121Ia 4500 | ||
|---|---|---|---|
| 100 | _aStern, Catherine | ||
| 942 | _cBK | ||
| 654 | _a | ||
| 245 |
_aChildren discover arithmetic _bAn Introduction to structural arithmetic |
||
| 260 |
_aNew York _bHarper & Brothers _c1949 |
||
| 082 | _a372.7 | ||
| 300 |
_bHb _c21.4 _axxiv,295 |
||
| 999 |
_c399171 _d399171 |
||
| 041 | _aeng | ||