9. Comitê Eleitoral. "Roberto Martins Deputado Federal PT." N.p.:, undated

9. Comitê Eleitoral. "Roberto Martins Deputado Federal PT." N.p.:, undated, Box: 11. Eduardo Sarno Collection of Leftist Movements in Brazil, 2002-03. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/373195 Accessed September 26, 2026.