000 00326nam a2200145Ia 4500
020 _a9788176938754
082 _b53
_a500
100 _a"NA"
245 0 _aUnderstanding Science
260 _bBPI INDIA PVT
_aNEW DELHI
_c2011
300 _a80
944 _cR
999 _c525802
_d525802