DarmaS. “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, Vol. 24, no. 1, June 2022, pp. 32-38, doi:10.29244/jitl.24.1.32-38.