Salvatore, Dominick.
Theory and Problems of Microeconomic Theory / - S.I. Ed. / - Singapore : McGraw-Hill Book Company. - p.326 :
0-07-099070-0
X:76 / M3;4
Theory and Problems of Microeconomic Theory / - S.I. Ed. / - Singapore : McGraw-Hill Book Company. - p.326 :
0-07-099070-0
X:76 / M3;4