00309nam a2200121Ia 45000030006000000080041000060400015000471000022000622450065000842600009001495460012001580050017001700STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aBerire, T.H.O. Tr  aRecreation in mathematics some novel problems Roland Sprague  c1963  aEnglish20220125170024.0