เหรียญแก้ว ป. Urea. Enriched Paddy Straw as Cattle Feed. Agriculture and Natural Resources, Bangkok, Thailand, v. 5, n. 3, p. 128–139, 1965. Disponível em: https://li01.tci-thaijo.org/index.php/anres/article/view/240615. Acesso em: 18 sep. 2026.