000 00282nam a2200121 4500
008 181217b xxu||||| |||| 00| 0 eng d
041 _aeng
080 _a510
100 _a36
101 _aMAT
245 _aDifferential Equations: Geometric Theory
_cLefschetz,S
942 _2ddc
_cBK
999 _c53326
_d53326