000 00272nam a2200109Ia 4500
008 230222s9999 xx 000 0 und d
082 _a621.3
100 _aVandana Singhal
245 0 _aElectrical science
260 _bS Chand And Company Ltd.,New Delhi
_c2003
942 _cBK
999 _c2689
_d2689