Wijaya J, Manurung MS. Penggerombolan Kabupaten/Kota di Sumatera Utara Berdasarkan Produktivitas Tanaman Pangan. J. Analytical Res. Statistic Computation [Internet]. 2023 Sep. 12 [cited 2026 Jun. 6];2(2). Available from: https://mail.jarsic.org/main/article/view/23