00590nam a22001811 4500 1/11803 971204s1957 enk 000 0eng d 0678013977 12167 DLC GR-PeUP 330 KO Koopmans, Tjalling C. Three essays on the state of economic science/ Tjalling C. Koopmans. New Jersey: Augustus M. Kelley publishers, 1991. 231p.: illus.; 22cm. Reprints of economic classics. Economics. INST UNIPILB MAIN 20040709 330 KO 00127429 00127429 LOAN 0 1