@book{7987,
	author = {WHO Expert Committee on Health Statistics (1968 : Geneva). and World Health Organization},
	title = {Statistics of health services and of their activities : thirteenth report of the WHO Expert Committee on Health Statistics [meeting held in Geneva from 12 to 18 November 1968].},
	publisher = {World Health Organization,},
	year = {1969.},
	series = {(WHO technical report series ; 429)},
	address = {Geneva : }
}