Petróleos Mexicanos (Pemex) se consolidó en 2012 como una de las empresas más competitivas del mundo en costos de exploración y producción, en comparación con las principales petroleras internacionales. (Leer más… http://www.jornada.unam.mx/ultimas/2013/11/12/75421311-cifras-de-pemex-la-ubican-entre-las-mas-competitivas-del-mundo)
(Spanish, Article, 2013)
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