1. União Metalúrgica. Boletim n° 002 [Orgão oficial do S.T.I.M.M.E.], (1983 March).

1. União Metalúrgica. Boletim n° 002 [Orgão oficial do S.T.I.M.M.E.], (1983 March)., Box: 24. 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/375477 Accessed September 26, 2026.