TAWIN KRUTKUN; SAMRUAY KRUTKUN; CHAMCHAN VIJARNSORN. Development and Conservation of Soil Fertility of Cultivated Soils of the East Region of Thailand. Agriculture and Natural Resources, Bangkok, Thailand, v. 25, n. 1, p. 1–8, 1991. Disponível em: https://li01.tci-thaijo.org/index.php/anres/article/view/241897. Acesso em: 18 sep. 2026.