000			00314nam a2200133Ia 4500
008			210901s1985 xx 000 0 eng d
020			_a8170144809
082			_a539 SEH
100			_aSehgal, D.L.
245		0	_aModern physics
260			_aNew Delhi _bS.Chand & Co. _c1985
650			_aPhysics
942			_2ddc _cBK
999			_c17632 _d17632