00405nam a2200133Ia 4500082002700000100001900027245004500046260007300091300001500164490006800179490001400247500000500261700000500266  a518.542502433bN843.SP  aNorman, Morris  aSoftware package for economic modelingb  aLuxemburgbInternational Institute for Applied System Analysisc1977  axii, 127p.  aInternational Institute for Applied Systems analysisv RR_77-21  aNov. 1977  a  a