Levels of Relative Development in the Peruvian Upper Jungle, 1972. Peruvian Amazon, [S. l.], n. 12, p. 9–35, 1985. DOI: 10.52980/revistaamazonaperuana.vi12.191. Disponível em: https://amazoniaperuana.caaap.org.pe/index.php/amazoniaperuana/article/view/191. Acesso em: 19 sep. 2026.