“The Physico-Chemical Properties of Sewage Sludge Processed for Agricultural Use from the Nyeri-Kangemi Wastewater Treatment Plant, Nyeri County, Kenya”. Journal of Environmental Sciences and Technology (JEST) 1, no. 1 (September 20, 2022): 37–47. Accessed October 21, 2026. https://journals.editononline.com/index.php/jest/article/view/251.