00313nam a2200121Ia 45000030006000000080041000060400015000471000025000622450044000872600031001315460012001620050017001740STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aHall, P; Hartley, B.  aStability groups of series of subgroups  bMathematical Societyc1965  aEnglish20220125170026.0