KRUTKUN, T. Effects of Lead Nitrate and Lead Oxide Added into Map Bon Sandy Loam Soil on Growth of Cassava. Agriculture and Natural Resources, Bangkok, Thailand, v. 18, n. 3, p. 149–152, 1984. Disponível em: https://li01.tci-thaijo.org/index.php/anres/article/view/240972. Acesso em: 18 sep. 2026.