000 00287nam a2200133Ia 4500
100 _aChattopadhyay, Deepanwita
365 _b30
942 _cBK
654 _a
245 _aLet's experiment with materials
260 _aNew Delhi
_bLearners Press
_c1994
082 _aJ
300 _a40
999 _c355539
_d355539
041 _aeng