TY - BOOK AU - Duckworth,W.E. AU - Gear,A.E. AU - Lockett,A.Geoffrey TI - A guide to operational research SN - 0470991453 U1 - 658.4034 23 PY - 1977/// CY - London, New York PB - Chapman and Hall, Wiley KW - Operations research N1 - "A Halsted Press book."; Includes bibliographies and indexes ER -