Income Analysis of Coffee Farmers and Its Impact on Regional Development (Case Study: Pematang Sidamanik District, Simalungun Regency, Indonesia): English. Asian Multidisciplinary Research Journal of Economy and Learning, [S. l.], v. 1, n. 1, p. 20–26, 2024. Disponível em: https://argaelpublisher.com/index.php/amjel/article/view/4.. Acesso em: 6 feb. 2025.