00279nam a2200121Ia 45000030006000000080041000060400015000471000020000622450021000822600025001035460012001280050017001400STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aWillard Stephen  aGeneral topology  bAddison Wesleyc1970  aEnglish20220125165938.0