000 00318nam a2200133Ia 4500
008 160316s1978 xxu||||| |||| 00| 0 eng d
020 _a
100 _aRobert S. Siegler
245 _aChildren'S Thinking What Develops
250 _a1st
260 _aNEW YORK
_bJHON WILEY & SONS
_c1978
300 _a371
700 _a
_a
999 _c30381
_d30381