00283nam a2200109Ia 4500008004100000040002500041082001800066100002000084245002100104260003700125300001100162230627s9999    xx            000 0 und d  aNORSU-SiacNORSU-Sia  a. 338.82 F91   aFriedman, James 0aOligopoly theory  bCambridge University Pressc1983  a240 p.