000			00330nam a2200145Ia 4500
008			210901s1983 xx 000 0 eng d
020			_a8170144809
082			_a539 SEH
100			_aSehgal
245		0	_aModern physics
260			_aNew Delhi _bS.Chand & Co. _c1983
300			_a422p.
650			_aPhysics
942			_2ddc _cBK
999			_c16278 _d16278