@book{3403,
	author = {Melnick, Sandra L},
	title = {A Guide for epidemiological studies of oral manifestations of HIV infection / },
	publisher = {WHO,},
	year = {1993.},
	address = {Geneva :},
	url = {https://apps.who.int/iris/bitstream/handle/10665/41787/9241544538.pdf?sequence=1&isAllowed=y}
}