656 Por C Porter, MIchel E. Cases in competitive strategy/ Michel E .Porter . - - New York : The Free Press ., London : Collier Macmillan Publishers, 1983. "Designed to be used in combination With . . . Competitive strategy " - Introd Incluye indice. ISBN 0-02-25410-8 1. COMPETENCIA ECONOMICA -CASOS 2. INDUSTRIA Y ADMINISTRACION I.t. combination with ... Competitive strategyIntrod Incluye indice. ISBN 0-02-25410-8 1 .COMPETENCIA ECONOMICA-CASGS 2.INDUSTRIA-DIRECCION Y ADMINISTRACION l.t.