Porter, Michael E., 1947- Competitive strategy : techniques for analyszing industries and competitors / Michael E. Porter - New York : The Free Press, 1998 - xxviii, 396 p. : ill. ; 25 cm. Publicación original: New York : Free Press, c1980. ISBN: 0684841487 (hardcover) Subjects--Topical Terms: Competition.Industrial management.Competitividad.Administración industrial. LC Class. No.: HD 41 / P847c 1998 Dewey Class. No.: 658.86