Madueño Valdez, Leonardo, Micheld Meza Pinedo, and Cesar Antonio Rashta Maguiña. “Treatment and Reuse of Gray Water Using a Slow Sand Filter”. TECNIA 28, no. 1 (June 1, 2018): 81–85. Accessed May 19, 2024. https://revistas.uni.edu.pe/index.php/tecnia/article/view/190.