000			00331nam a2200145Ia 4500
005			20260205102518.0
008			260111s9999||||xx |||||||||||||| ||und||
082			_a500 B181V
100			_aD.Balasubraminyan
245		0	_aVigyan(H )
260			_aNew Delhi _bNCERT _c1989
300			_a316p.
690			_aScience
942			_cBK
999			_c246760 _d246760