00299nam a2200121Ia 45000030006000000080041000060400015000471000024000622450041000862600021001275460012001480050017001600STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aCornell Francis, G.  aEssentials of educational statistics  bJohn Wileyc1956  aEnglish20220125170049.0