@book{2918,
	title = {Progress on sanitation and drinking water – 2015 update and MDG assessment},
	publisher = {WHO,},
	year = {2015.},
	address = {Geneva :},
	url = {https://apps.who.int/iris/bitstream/handle/10665/177752/9789241509145_eng.pdf?sequence=1&isAllowed=y}
}