000			00357nam a2200157Ia 4500
008			170207s9999 xx 000 0 und d
082			_aPG 539 THE-M
100			_aTheraja, B L
245			_aModern physics
260			_bS Chand & Co. Ltd., New Delhi
260			_c1989
300			_a432
365			_b27
650			_aModern physics
942			_cBOOKS
999			_c29694 _d29694