00263nam a2200121Ia 45000030006000000080041000060400015000471000020000622450021000822600009001035460012001120050017001240STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aKelley John, L.  aGeneral topology  c1965  aEnglish20220125165939.0