4. Núcleo Municipal do Partido dos Trabalhadores. "Matar a cobra e mostrar o pau." São Bernardo do Campo:, undated

4. Núcleo Municipal do Partido dos Trabalhadores. "Matar a cobra e mostrar o pau." São Bernardo do Campo:, undated, Box: 16. 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/373834 Accessed September 26, 2026.