Introduction to operations research / C. West Churchman, Russell L. Ackoff [and] E. Leonard Arnoff, in collaboration with Leslie C. Edie [and others] Churchman, C. West (Charles West), 1913- Operations research. Research, Industrial. Q175 .C478 519.9 CHI Includes bibliographical references and index New York, Wiley 1957 1957 1957 Text x, 645 p. : eng