00646nam a22001931 4500 1/18297 011204s1991 enk 1 eng d 0080402402 18836 DLC GR-PeUP 658.4'034 OP Operational research '90 / ed. by Hugh E. Bradley Oxford: Pergamon press, 1991 xxv, 821 p.: 24 cm. Include index Operations research. Bradley, Hugh E. ed. INST UNIPILB MAIN 20040709 658.4'034 OP 00137636 00137636 LOAN 0 1 INST UNIPILB MAIN 20040709 658.4'034 OP 00142474 00142474 LOAN 0 2