00284nam a2200121Ia 45000030006000000080041000060400015000471000022000622450040000842600009001245460012001330050017001450STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aBeiler Albert, H.  aRecreation in the theory of numbers  c1964  aEnglish20220125165931.0