000 00321nam a2200109Ia 4500
008 211215s9999 xx 000 0 und d
040 _cJayakar Knowledge Resource Centre
100 _aChurchman, C. W.
245 0 _aManagement Sciences , Models & Techniques: Vol. 1
260 _bPergaman Press
_aNewYork
_c1960
942 _c1
999 _c66299
_d66299