Saragih, F. S.; Djamil, H. .; Juanda, J.; Mubarak, A. S. .; Hasan, V. .; Sihombing, A. .; Satyantini, W. H. . Nutrient Concentration, Water Brightness, Chlorophyll-A, and Phytoplankton Abundance As Indicators for Determining the Trophic Status of Lake Toba, North Sumatera - Indonesia. JAFH 2024, 13, 366-374.