Setyorini, H., & Maria, E. (2019). Nitrat and Phosphate Contents in Water Surface of Jungwok Beach, Gunungkidul District, Yogyakarta. Akuatik: Jurnal Sumberdaya Perairan, 13(1), 87-93. https://doi.org/10.33019/akuatik.v13i1.1201