1.Water, Sanitation and Hygiene. The benefits of having access to an improved drinking water source can only be fully realized when there is also access to…https://www.unwater.org/app/uploads/2018/10/WaterFacts_water_sanitation_hygiene_Sep2018.pdf
2.World Health Organization2018Cited by 15 — safely managed drinking-water, sanitation and hygiene in households, and … http://www.who.int/water_sanitation_health/publications/2012/globalcosts.pdf.https://fsmtoolbox.com/assets/pdf/WHO_water,_sanitation_and_hygiene_strategy_2018-2025.pdf