@book{2460,
	author = {World Health Organization. },
	title = {Safe vitamin A dosage during pregnancy and lactation : },
	publisher = {WHO,},
	year = {19998.},
	series = {Micronutrient series},
	address = {Geneva :},
	url = {https://apps.who.int/iris/bitstream/handle/10665/63838/WHO_NUT_98.4_eng.pdf?sequence=1&isAllowed=y}
}