Ravindran, A. Operations research : principles and practice / A. Ravindran, Don T. Phillips and James J. Solberg. - 2nd ed. - New York : Wiley, c1987. - xviii, 637 p. : ill. ; 23 cm. Includes index. Includes bibliographies. english LCCN: 86005561 Subjects--Topical Terms: Operations research. LC Class. No.: T57.6 / .P48 1987 Dewey Class. No.: 001.424/RAO