00267nam a2200121Ia 45000030006000000080041000060400015000471000023000622450022000852600009001075460012001160050017001280STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aSpiegel Murray, R.  aComplex variables  c1981  aEnglish20220125170044.0