00534nam a22001811 4500 1/13751 990716s1957 enk 1 eng d 14211 DLC GR-PeUP 330 BE. Beach, E. F. Economic models: an exportation/ E. F. Beach. New York: John Wiley & Sons, 1957. 227p.: tabl., fig.; 22cm. Index. Economics. Economic Models. INST UNIPILB MAIN 20040709 330 BE. 00129675 00129675 LOAN 0 1