Anim Ofosu, Samuel, Emmanuel Okoh Agyemang, and Samuel Wiafe. “The Use of a Model Sand Filtration System for Greywater Treatment: A Case Study of Hotels and Hostels in Eastern Region, Ghana”. Health, Safety and Environment 2, no. 8 (November 13, 2020). Accessed July 22, 2024. https://sjournals.com/index.php/hse/article/view/1534.