DarmaS. (2022) “Land Suitability of Rice Fields in Bumi Rapak Village and Selangkau Village East Kutai Regency: Kesesuaian Lahan Padi Sawah di Desa Bumi Rapak dan Desa Selangkau Kabupaten Kutai Timur”, Jurnal Ilmu Tanah dan Lingkungan, 24(1), pp. 32-38. doi: 10.29244/jitl.24.1.32-38.