FERRÁNDEZ BRU, J. M. J. R. R. Tolkien and the Spanish civil war. Mallorn: The Journal of the Tolkien Society, [S. l.], n. 51, p. 16–19, 2011. Disponível em: https://journals.tolkiensociety.org/mallorn/article/view/78. Acesso em: 1 may. 2024.