000			00328nam a2200133Ia 4500
005			20260720174539.0
008			260720s2006 xx 000 0 und d
041			_aeng
082			_a500.7 YADT
100			_aYadav, M S _9267950
245			_aTeaching of science
260			_aNew Delhi _bA P H Publishing _c2006
300			_a240p
999			_c242028 _d242028