000 00249nam a2200109Ia 4500
008 230401s9999 xx 000 0 eng d
100 _aGAUR(RK) &GUPTA (SC)
245 0 _aENGG. PHYSICS
250 _a1999
260 _bDHANPAT RAI
942 _2ddc
_cBTECH
999 _c4395
_d4395