Clement, Charles R, William Denevan, Michael Heckenberger, Andre Braga Junqueira, Eduardo Neves, Wenceslau Teixeira, and William Woods. “Agro-Ecology: Much of the Amazon Rain Forest Was Once Farmland”. World Nutrition 6, no. 9-10 (October 30, 2015): 694–703. Accessed May 9, 2026. https://worldnutritionjournal.org/wn/article/view/69.