2. Bruno, R.S. "A estrategia e a tática dos marxistas brasileiros." N.p.:, 1980.

2. Bruno, R.S. "A estrategia e a tática dos marxistas brasileiros." N.p.:, 1980., Box: 19. 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/374466 Accessed September 26, 2026.