4. O CC do PRC. "Realizar o III° Congresso, tarefa orgânica central." N.p.:, 1989 February.

4. O CC do PRC. "Realizar o III° Congresso, tarefa orgânica central." N.p.:, 1989 February., Box: 11. 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/373169 Accessed September 26, 2026.