Nedi, Syahril, Yolanda Manik, and Elizal elizal. 2020. “SEDIMENT FRACTIONS AND ORGANIC MATERIALS IN THE DUMAI RIVER ESTUARY WATERS, RIAU, INDONESIA”. Asian Journal of Aquatic Sciences 1 (1), 66-71. https://doi.org/10.31258/ajoas.1.1.66-71.