Syafrizal, Irvina Nurrachmi, and Efriyeldi Efriyeldi. 2021. “RELATIONSHIP OF NITRATE AND PHOSPHATE CONCENTRATION ON PHYTOPLANKTON PRIMARY PRODUCTIVITY IN DUMAI RIVERS OF RIAU PROVINCE”. Asian Journal of Aquatic Sciences 4 (1), 54-64. https://doi.org/10.31258/ajoas.4.1.54-64.