00275nam a2200121Ia 45000030006000000080041000060400015000471000023000622450030000852600009001155460012001240050017001360STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aSchafer Helmut, H.  aTopological vector spaces  c1971  aEnglish20220125165940.0