15. "Lula pede ao Goberno fim de intervenção em todos sindicatos."O Liberal, (1980 February 11).

15. "Lula pede ao Goberno fim de intervenção em todos sindicatos."O Liberal, (1980 February 11)., 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/373891 Accessed September 26, 2026.