000 00310nam a2200121Ia 4500
008 230303s9999 xx 000 0 und d
041 _aeng
082 _a621.8 GUP
100 _aGupta (J.B)
245 _aElectrical and Electronics Engineering Materials
260 _aDELHI
_bS.K.KATARIA & SONS
365 _cRS
999 _c224048
_d224048