Headline: Quem são os irmãos Koch?Link: http://www.cartacapital.com.br/politica/quem-sao-os-irmaos-koch-2894.htmlPublication Date: Tuesday, March 24, 2015Primary Source: Carta CapitalNon-Cato Author: Antonio Luiz M. C. CostaType: op-edFormat: Newspaper (Online)Nature of Mention: mentionedScholar: CatoResearch Area: Government and PoliticsSubjects: the Koch brothers