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003 OSt
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024 _a47712
037 _cTextual
040 _aCRL
_cCRL
_beng
041 _2eng
_aeng
082 _aT15:3(A), L7
100 _aGood Ronal G
_9615228
245 0 _aHow childern learn science
_b Conceptual development and implications for teaching
260 _aNew York
_bMacmillan
_c1977
300 _a337p
_ccm.
650 _aEDUCATION
942 _hT15:3(A), L7
_cTEXL
_2cc
999 _c995694
_d995694