1. Partido dos Trabalhadores. "Carlos Silveira. PT-Deputado Estadual-86." N.p.:, undated

1. Partido dos Trabalhadores. "Carlos Silveira. PT-Deputado Estadual-86." N.p.:, undated, Box: 5. 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/372205 Accessed September 26, 2026.