000 00288nam a2200109Ia 4500
001 81419
008 170722s9999 xx 000 0 und d
245 _aSorting them out
_bTwo essay on social differentiation /
260 _bOpen uty press ,
_c1974.
300 _a140 p.
_c28cms
942 _cGEN
999 _c94864
_d94864