00298nam a2200133Ia 45000030006000000080041000060400015000471000018000622450024000802500010001042600021001145460012001350050017001470STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aCochran, W.G.  aSampling techniques  aThird  bJohn Wileyc1990  aEnglish20220125170040.0