| 000 | 00457nam a22001097a 4500 | ||
|---|---|---|---|
| 008 | 230714b |||||||| |||| 00| 0 eng d | ||
| 040 |
_aNational Science Library _cNational Science Library |
||
| 245 |
_aEducational technology: _bThe design and implementation of learning systems _c/ This report is based on the work of CERI in the field...........................19th to 25 April, 1970 |
||
| 260 |
_aParis: _bOECD, _c1971 |
||
| 300 | _a86p. | ||
| 942 |
_2udc _cREF |
||
| 999 |
_c52505 _d52505 |
||