000 00392nam a2200181Ia 4500
008 241004s9999 xx 000 0 und d
020 _a9788120000000
082 _bGup
100 _aGupta, A.S
245 0 _aCalculation of variation with application
250 _a8th
260 _aDelhi
260 _bPHI
260 _c2023
300 _avii, 240
365 _b495
942 _cBK
999 _c197218
_d197218