"X Congresso dos Trabalhadores nas Industrias Metalúrgicas Mecánicas e de Material Elétrico do Brasil." Poços de Caldas:, 2979 June 4-9.

"X Congresso dos Trabalhadores nas Industrias Metalúrgicas Mecánicas e de Material Elétrico do Brasil." Poços de Caldas:, 2979 June 4-9., Box: 25, Folder: 3. 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/375598 Accessed September 26, 2026.