@book{2423,
	author = {Janovsky, Katja and World Health Organization. },
	title = {The challenge of implementation : },
	publisher = {WHO,},
	year = {1988.},
	address = {Geneva :},
	url = {https://apps.who.int/iris/bitstream/handle/10665/62369/WHO_SHS_DHS_88.1_Rev.1.pdf?sequence=1&isAllowed=y}
}