000 00319nam a2200133Ia 4500
008 220201s2021 xx 000 0 eng d
082 _a510
100 _aGReference EWAL, BS
245 0 _aHigher engineering mathematics
250 _a44th
260 _bKhanna Book Publication
_c2021
300 _a1235p.
942 _2ddc
999 _c2379
_d2379