000 00281nam a2200133Ia 4500
100 _aGhai,Shuchita.
365 _b90
942 _cBK
654 _a
245 _aGreat scientific inventions
260 _aNew Delhi
_bLearners Press
_c1997
082 _a608
300 _bPb
_ax,193
999 _c396351
_d396351
041 _aeng