Dos cartas de Don Manuel María del Valle. Amazonía Peruana, [S. l.], n. 17, p. 163–172, 2026. DOI: 10.52980/se1x4b76. Disponível em: https://amazoniaperuana.caaap.org.pe/index.php/amazoniaperuana/article/view/978. Acesso em: 3 oct. 2026.