TY - BOOK AU - Porter,Michael E. TI - Competitive strategy: techniques for analyzing industries and competitors SN - 9780743260886 (pbk) AV - HD41 .P67 1980 U1 - 658.4012 22 PY - 2004/// CY - New York, London PB - Free press KW - Strategic planning KW - Competition N1 - Originally published: 1980; Includes bibliographical references and index ER -