000			00321nam a2200145Ia 4500
008			131111s9999 xx 000 0 und d
100			_aYadav,M.S
245			_aTeaching of chemistry
260			_aNew Delhi
260			_bAnmol
260			_c1993
300			_a249p.
650			_aEducation _aTeaching
763			_a21490
999			_c42332 _d42332