WIJAYA, J.; MANURUNG, M. S. Penggerombolan Kabupaten/Kota di Sumatera Utara Berdasarkan Produktivitas Tanaman Pangan. Journal of Analytical Research, Statistics and Computation, [S. l.], v. 2, n. 2, 2023. DOI: 10.4590/jarsic.v2i2.23. Disponível em: https://www.jarsic.org/main/article/view/23. Acesso em: 18 apr. 2026.