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4.Tribuna Bancária [Em defesa do sindicalismo unitário, classista e combativo]., (1990 March)., Box: 12. 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/373305 Accessed September 26, 2026.