000 00231nam a2200085 4500
080 _a517.9
_bKEL.60
245 _aElementary differential equations. Ed - 5
100 _aKells, Lyman M
260 _aNew York
_bMcGraw-Hill Book Company, Inc.
_c1960
300 _ax+318p
999 _c23776
_d23776