| 000 | 00388nam a2200145Ia 4500 | ||
|---|---|---|---|
| 008 | 130223s9999 xx 000 0 und d | ||
| 100 | _aHaddad, W.D. | ||
| 245 | _aEducational and economic effect of promotion and repetition practices | ||
| 260 | _aWashington | ||
| 260 | _c1979 | ||
| 300 | _a52 p. | ||
| 440 | _aNo. 319; World Bank Staff Work | ||
| 901 | _pS31303 | ||
| 942 |
_cB _2udc |
||
| 999 |
_c120783 _d120783 |
||