000 00309nam a2200145Ia 4500
100 _aChandra, Ramesh
020 _a81-7835-232-X
365 _b890
942 _cBK
654 _a
245 _aScience education
260 _aDelhi
_bKalpaz Publications
_c2005
082 _a375.5
300 _bHb
_aviii,350
999 _c388011
_d388011
041 _aeng