00325nam a2200121Ia 450000500170000000800410001702000180005805000150007610000180009124500450010926000360015465000130019020251229124313.0251229s9999    xx            000 0 und d  a9780201576986  aQA 611.C35  aCain,George L 0aIntroduction to general topologycL Cain  aReadingb Addison-Wesley Pub. C  aTopology