| 000 | 00436nam a22001337a 4500 | ||
|---|---|---|---|
| 999 |
_c9746 _d9746 |
||
| 050 | _aCir 510 H36 1988 | ||
| 100 | _aHeddens, James W. | ||
| 245 |
_aToday's mathematics : _bconcepts and methods in elementary school mathematics / _cJames W. Heddens |
||
| 260 |
_aChicago ; _bScience Research Associates ; _cc1988 |
||
| 300 | _a677 p. | ||
| 526 | _a500-599 | ||
| 650 | _aMathematics -- Study and teaching (Elementary) | ||
| 942 |
_2ddc _cBK |
||