Porter, Michael E., 1947- Competitive strategy techniques for analyzing industries and competitors / [Book :] Michael E. Porter. - 1st ed. - New York : Free Press, 1980. - xx, 396 p. : ill. ; 25 cm. Includes index. Bibliography: p. 383-387. All Ages. ISBN: 0029253608 Subjects--Topical Terms: Competition.Industrial management.Concurrence.Gestion d'entreprise. Dewey Class. No.: 658 National Library of Medicine Call No.: / PC