000 00284nam a2200109Ia 4500
100 _aChild Development; Vol 49 No 3-12
942 _cBK
654 _a
245 _aChild Development; Vol 49 No 3-12
_b1978
260 _aIllinois
_bUniversity of Chicago Press
_c1978
082 _a155.4.05
999 _c364270
_d364270
041 _aeng