TY - BOOK T1 - Competitive strategy : techniques for analyzing industries and competitors A1 - Porter, Michael E. LA - English PP - New York PB - the free press YR - 2004 UL - https://colectivo.uloyola.es/Record/L194052 OP - 396 SN - 0743260880 KW - Competencia económica KW - Planificación estratégica ER -