000 00343nam a2200157Ia 4500
008 230913s9999 xx 000 0 und d
082 _a515.35 GUP
100 _aGupta, R.K
245 0 _aDiffereutial Equations
250 _aXXXIi
260 _aMEERUT
260 _bKRISHANA
260 _c2000
300 _a580
650 _aMathematics
999 _c138952
_d138952