Dias de Luna, M. L., Tavares de Sousa, J., Antunes de Lima, V. L., de Sousa Alves, A., & William Pearson, H. (2013). Post-treatment of septic tank effluents using intermittent sand filters operating under tropical conditions. Scientia Plena, 9(9). Retrieved from https://www.scientiaplena.org.br/sp/article/view/1115