000 00296nam a2200121Ia 4500
003 LDD
040 _cLDD
041 _aen
245 0 _aAmerican Educational Research Journal
260 _aWashington
_bAmerican Economic Association
_c1 Jan-30 Jun,1997
362 _a34-34
_b01-Feb
942 _2ddc
_cJ
999 _c191252
_d191252