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100 _aGUPTA S L
245 0 _aCONCEPTS OF MODERN PHYSICS
245 0 _aCONCEPTS OF MODERN PHYSICS
250 _n1st
260 _aNEW DELHI
260 _bDHANPAT RAI
260 _c1999
300 _a628
365 _b90
650 _aPHYSICS
650 _bMODERN PHYSICS
700 _aGUPTA S
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