@book{4855,
	author = {Hackett, Cecil John and 	World Health Organization},
	title = {Differential diagnosis of yaws / },
	publisher = {DHO,},
	year = {1960.},
	series = {World Health Organization monograph series ; },
	address = {Geneva :},
	url = {https://apps.who.int/iris/bitstream/handle/10665/41715/WHO_MONO_45.pdf?sequence=1&isAllowed=y}
}