RUIZ SIMÓN, E. . Historical views of solidarity the twentieth century: Development and international cooperation through Manos Unidas newsletters. HUMAN REVIEW. International Humanities Review / Revista Internacional de Humanidades, [S. l.], v. 15, n. 2, p. 1–8, 2022. Disponível em: https://historicoeagora.net/revHUMAN/article/view/4223. Acesso em: 5 jun. 2025.