000 00267nam a2200109Ia 4500
100 _aChild Development; Vol 57
942 _cBK
654 _a
245 _aChild Development; Vol 57
_b1986
260 _aIllinois
_bUniversity of Chicago Press
_c1986
082 _a155.405
999 _c360469
_d360469
041 _aeng