KIRTTRAKOLKAL, P.; BHROMSIRI, A. Chemical Fertilizer Management for Head Lettuce in the Northern Highland . Thai Agricultural Research Journal, [S. l.], v. 26, n. 3, p. 275–290, 2008. DOI: 10.14456/thaidoa-agres.2008.23. Disponível em: https://li01.tci-thaijo.org/index.php/thaiagriculturalresearch/article/view/99437. Acesso em: 1 oct. 2026.