1. "II Encontro Sindical dos Trabalhadores do Estado do Pará." Belém:, 1968 August.

1. "II Encontro Sindical dos Trabalhadores do Estado do Pará." Belém:, 1968 August., Box: 25. 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/375585 Accessed September 26, 2026.