| 000 | 00396nam a2200133 a 4500 | ||
|---|---|---|---|
| 003 | DLC | ||
| 005 | 20210219152806.0 | ||
| 008 | 991125s1974 000 0 eng u | ||
| 022 | _a0771-100X | ||
| 035 | _aUPN01000061389 | ||
| 245 | 0 | 0 | _aPROCEEDINGS OF THE 21st CONFERENCE OF THE INTERNATIONAL GROUP FOR THE PSYCHOLOGY OF MATHEMATICS EDUCATION |
| 260 | _aUniversity of Helsinsky | ||
| 905 | _aRevista | ||
| 999 |
_c60959 _d60959 |
||