00319nam a2200109Ia 4500003000400000008004100004040000800045100002000053245008800073260003400161300001400195LDD181029s9999    xx            000 0 und d  cLDD  aErikson, Robert 4aThe constant flux; a study of class mobility in industrial socitiescRobert Erikson  aOxfordbClarendon pressc1992  axvi,429p.