004180000a22001330004500060000800000082001200008100002000020245003800040260005400078260000900132300000800141490006000149650007500209  a100  a305 TUM  aTumin, Melvin M  aReadings on social stratification  aNewJerssey, Prentice -Hall Inc / Euglewood cliffs  c1970  a454  aPrentice - Hall readings in in modern sociology science  aSocial stractification/ stractification/ evaluation/ variation systems