Firdous, Farah, et al. “Influence of Sewage Sludge Dose on Physicochemical Characteristics of Soil and Productivity of Radish (Raphanus Sativus L.)”. Wadi Alshatti University Journal of Pure and Applied Sciences, vol. 2, no. 2, June 2024, pp. 6-15, https://waujpas.com/index.php/journal/article/view/68.