00282nam a2200109 a 450000500170000002000150001708200130003210000230004524500440006826000420011230000180015420251203092052.0  a0070990115  a514bLIP  aLipschutz, Seymour  aTheory and problems of General topology  aSingaporebMcGraw-Hill Book Co.c1965  a239p.c26 cm.