Fredrick, Mwanuzi. “MODELLING OF AGRICULTURAL NON-POINT SOURCES POLLUTANTS IN UPPER PANGANI RIVER BASIN (UPRB), TANZANIA”. Tanzania Journal of Engineering and Technology 30, no. 2 (June 21, 2018). Accessed April 7, 2026. http://196.44.161.124/index.php/tjet/article/view/1767.