000 00298nam a2200109Ia 4500
008 211215s9999 xx 000 0 und d
040 _cJayakar Knowledge Resource Centre
100 _aSherif, M.
245 0 _aGroups in harmony and tension
260 _bHarper and bros.
_aNew York
_c1953
942 _c1
999 _c41391
_d41391