7. O.B. João [illegible] [Bautista?] Drumond. "Sobre a luta interna nacional" [Ao: CR do PC do B (esquerda) no Pará]. N.p.:, 1982 May.

7. O.B. João [illegible] [Bautista?] Drumond. "Sobre a luta interna nacional" [Ao: CR do PC do B (esquerda) no Pará]. N.p.:, 1982 May., 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/373544 Accessed September 26, 2026.