000 00277nam a2200121Ia 4500
008 211209s1977 xx 000 0 und d
041 _aeng
082 _a658.403 4 N77 DUC
100 _aDUCK WORTH
245 _aGUIDE TO OPERATIONAL RESEARCH
260 _c1977
300 _a204
999 _c12869
_d12869