000 00267nam a2200109Ia 4500
100 _aChild Development; Vol 54
942 _cBK
654 _a
245 _aChild Development; Vol 54
_b1983
260 _aIllinois
_bUniversity of Chicago Press
_c1983
082 _a155.405
999 _c374204
_d374204
041 _aeng