00431nam a2200145   450000100060000000300030000600500170000900800410002603500190006703500180008605000220010410000250012624500900015126000440024136331UR20220427193859.0061105|||||||||||||||||||||||||||||||| d  a(janium) 36320  a(janium)36318 4aHD69b.D4G54 19691 aGillis Jr., Floyd E.10aManagerial economicsb : decision making under certainty for business and engineering  bAddison Wesley Publishing Companyc1969