Théophile M, Ali MS, Pacific M, Jairus D. Evaluation of the quality of water, hygiene and sanitation in public elementary schools in the 7th Arrondissement of Ndjamena city Chad. IJSSASS [Internet]. 2025 Jan. 26 [cited 2026 Apr. 29];4(4):4288-311. Available from: https://www.ijssass.com/index.php/ijssass/article/view/314