000 00315nam a2200133Ia 4500
008 220314s9999||||xx |||||||||||||| ||und||
080 _a539
100 _aSehgal, et al.
245 0 _aModern physics
260 _bSultan Chand & Sons, New Delhi
_c1972
300 _a556
650 _aModern physics
942 _cBOOK
999 _c19617
_d19617