1. Orlando. "A crise no CR-SP.Doc. 4. Sobre a concepção leninista de partido." N.p.:, 1981 September.

1. Orlando. "A crise no CR-SP.Doc. 4. Sobre a concepção leninista de partido." N.p.:, 1981 September., 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/374449 Accessed September 26, 2026.