000 00278nam a2200109Ia 4500
008 240407s9999 xx 000 0 und d
100 _aAlexandroff, Paul
245 0 _aElementary Concepts of Topology
260 _aNew York
_bDover Publications
_c1961
300 _a57p.
942 _cBK
999 _c890
_d890