000 00309nam a2200121Ia 4500
008 221001s1965 xx 000 0 eng d
082 _a515.35 ELS
100 _aEl'sgol'ts, L. E.
245 0 _aDifferential equations
260 _aDelhi
_bHindustan Publishing
_c1965
300 _aiii, 359p.
942 _2ddc
_cBK
999 _c11465
_d11465