000 00249nam a22001097a 4500
082 _a513.83
_bALE.E
100 _aALEXANDROFF,PAUL
245 _aELEMENTARY CONCEPTS OF TOPOLOGY
260 _aNEW YORK:
_bDOVER,
_c1961.
300 _a57p.
942 _cBK
999 _c326779
_d326779