5. Fr., Pe., and Ve. CR-P. "Em defesa de un método leninista de trabalho." N.p.:, 1980 October 13.

5. Fr., Pe., and Ve. CR-P. "Em defesa de un método leninista de trabalho." N.p.:, 1980 October 13., Box: 14. 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/373489 Accessed September 26, 2026.