00278nam a2200121Ia 45000030006000000080041000060400015000471000017000622450039000792600009001185460012001270050017001390STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aSharma, K.L.  aSocial stratification and mobility  c1994  aEnglish20220125165458.0