00299nam a2200121Ia 45000030006000000080041000060400015000471000044000622450025001062600017001315460012001480050017001600STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aJournal of the Mathematical Association  aMathematical gazette  bG.Bellc1968  aEnglish20220125170026.0