00314nam a2200121Ia 4500008004100000041000800041082002100049100001600070245005100086250001000137260003700147300000800184211209s1987    xx            000 0 und d  aeng  a658.4034 N87 RAV  aRAVIDRAN, A  aOPERATIONS RESEARCH : PRINCIPLES AND PRACTICE   a2 ed.  aNEWYORKbJOHN WILEY & SONSc1987  a637