MOREY, R. V. RUDDLE, Kenneth. The Yukpa Cultivation System. A Study of Shifting Cultivation in Colombia and Venezuela. Estudos Ibero-Americanos, [S. l.], v. 2, n. 1, p. 148–151, 1976. DOI: 10.15448/1980-864X.1976.1.36854. Disponível em: https://revistaseletronicas.pucrs.br/ojs/index.php/iberoamericana/article/view/36854. Acesso em: 28 abr. 2024.