000			00301nam a2200133Ia 4500
005			20241213175302.0
008			241213s9999 xx 000 0 und d
100			_aN C E R T
245		0	_aLearning science (Std VI)
260			_aNew Delhi
260			_bN C E R T
260			_c1977
300			_a234p.
999			_c48287 _d48287