000 00312nam a2200133Ia 4500
008 210901s9999 xx 000 0 eng d
082 _a530.11 GUP
100 _aGupta, S.N.
245 0 _aTheory of relativity
260 _aMeerut
_bMeenakshi Prakahsna
300 _a412
650 _aPhysics
942 _2ddc
_cBK
999 _c11344
_d11344