000 00488 a2200253 4500
001 42557
020 _a12
041 _aeng
080 _a517.9 Kel(2)
245 _aElementary differential equations
250 _a4th ed
260 _aNew York
260 _bMcGraw-Hill,
260 _c1954
300 _ax,266 p.
300 _c23 cm
490 _a
100 _aKells, Lyman M.
700 _a
650 _a
650 _aDifferential equations
942 _cBK
942 _2UDC
999 _c36802
_d36802