| 000 | 00339nam a2200085Ia 4500 | ||
|---|---|---|---|
| 008 | 120229s9999 xx 000 0 und d | ||
| 082 | _a510.5 INV | ||
| 245 | _aInvestigations in mathematics education : expanded abstracts and critical analyses of recent research | ||
| 260 |
_bCentre for Science Mathematics Education _aColumbus, Ohio _c1972 |
||
| 999 |
_c114313 _d114313 |
||