000 00297nam a2200121Ia 4500
008 140317s9999 xx 000 0 und d
082 _a301.43
100 _aFestinger,Leon
245 _aSocial pressures in informal groups.
260 _aLondon
_bTavistock
_c1950
300 _a197
942 _2ddc
_cBK
999 _c3500
_d3500