BUTTAPHA, D.; SEERASARN, N.; SANSERM, S. K. Coffee Production and the Use of Bioproducts among Farmers in Song District, Phrae Province. Rajamangala University of Technology Tawan-ok Research Journal, Chonburi, Thailand, v. 19, n. 1, p. 52–59, 2026. DOI: 10.63271/rmuttorj.v19i1.270315. Disponível em: https://li01.tci-thaijo.org/index.php/researchjournal2rmutto/article/view/270315. Acesso em: 16 sep. 2026.