@book{4928,
	author = {WHO Expert Committee on Biological Standardization (1997 : Geneva).},
	title = {WHO Expert Committee on Biological Standardization : forty-eighth report, [Geneva, 27-31 October 1997].},
	publisher = {World Health Organization,},
	year = {1999.},
	series = {(WHO technical report series ; 889).},
	address = {Geneva : }
}