Triadiawarman, Dian. “Kondisi Tanah Habitat Ulin (Eusideroxylon Zwageri T & B) Di Prevab Taman Nasional Kutai Kabupaten Kutai Timur”. Jurnal Pertanian Terpadu 6, no. 1 (Juni 13, 2018): 11–20. Diakses Maret 14, 2026. https://ojs.mine-cloud.my.id/index.php/jpt/article/view/138.