4. "Funcionários da KONTIK em greve." N.p.:, 1988 March.

4. "Funcionários da KONTIK em greve." N.p.:, 1988 March., Box: 18. 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/374181 Accessed September 26, 2026.