00285nam a2200133Ia 45000030006000000080041000060400015000471000018000622450023000802500010001032600009001135460012001220050017001340STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aWallace, A.H.  aAlgebraic topology  aFirst  c1963  aEnglish20220125165938.0