000 00272nam a22001217a 4500
008 181204b xxu||||| |||| 00| 0 eng d
041 _aeng
080 _a510
100 _a36
101 _aMAT
245 _aFoundations of General Topology
_cPervin, W.J
942 _2udc
_cBK
999 _c52826
_d52826