000 00271nam a2200097Ia 4500
008 230421s9999 xx 000 0 eng d
100 _aMangal (S.K.) Avam Mangal (Subhra)
245 0 _aBhautik Vigyan Shikshan
260 _bInternational Publishing House
942 _2ddc
_cBED
999 _c21245
_d21245