Djumanto, Djumanto, and N. Probosunu. 2017. “Biodiversitas Sumber Daya Ikan Di Hulu Sungai Opak [Biodiversity of Fisheries Resources in Upstream of Opak River]”. Jurnal Iktiologi Indonesia 11 (1), 1-10. https://doi.org/10.32491/jii.v11i1.144.