Porter, Michael E., 1947- Competitive strategy : techniques for analyzing industries and competitors / Competitive strategy : Techniques for analysing industries and competitors Michael E. Porter. - xxviii, 396 pages ; 24 cm Originally published: 1980. Includes bibliographical references and index. ISBN: 0743260880 9780743260886 Subjects--Topical Terms: Strategic planning.Competition Dewey Class. No.: 658.4012