@book{2235,
	author = {World Health Organization},
	title = {COVID-19 : },
	publisher = {WHO,},
	year = {2020.},
	address = {Geneva :},
	url = {https://apps.who.int/iris/bitstream/handle/10665/331561/WHO-2019-nCoV-essential_health_services-2020.1-eng.pdf?sequence=1&isAllowed=y}
}