000 00390nam a2200133Ia 4500
082 _a371.28
_bHAD
100 _aHaddad, Wadi D.
245 _aEducational and economic effects of promotion and repetition practices.
260 _aWashington D.C.
_bWorld Bank
_c1979
300 _a54,iip.
440 _aWorld Bank staff working paper
_vNo.319
890 _aUnited States
999 _c9270
_d9270