“Kandungan Nitrogen Saat Pasang Dan Surut Di Sungai Mahakam Kota Samarinda: Nitrogen Content During High and Low Tides in the Mahakam River, Samarinda City”. Jurnal Ilmu Perikanan Tropis Nusantara (Nusantara Tropical Fisheries Science Journal) 2, no. 1 (March 8, 2023): 24–29. Accessed September 2, 2025. https://e-journals2.unmul.ac.id/index.php/jipt/article/view/179.