000 00282nam a2200121Ia 4500
008 211209s1969 xx 000 0 und d
041 _aeng
082 _a515.35 N69 GUP
100 _aGUPTA R N
245 _aTEXT BOOK OF ON DIFFERENTIAL EQUATIONS
260 _c1969
300 _a119
999 _c12438
_d12438