Porter, Michael E. Competitive strategy : techniques for analyzing industries and competitors : with a new introduction / Michael E. Porter. - New York : Free Press, c1998. - xxviii, 396 p. : ill. ; 24 cm. Includes bibliographical references and index. ISBN: 9780684841489 Subjects--Topical Terms: Competition.Industrial management. LC Class. No.: HD41 / .P67 1998