Gurusinga, B., Perwira, I., & Waskitasari, A. (2022). Kandungan Nutrien (Nitrat dan Fosfat) di Sungai Seruai, Sumatera Utara. Current Trends In Aquatic Science, 5(2), 135-141. Retrieved from http://103.29.196.112/index.php/ctas/article/view/84735