@book{7925,
	author = {WHO Expert Committee on Biological Standardization (1967 : Geneva). and World Health Organization},
	title = {WHO Expert Committee on Biological Standardization [meeting held in Geneva from 25 to 30 September 1967] : twentieth report.},
	publisher = {World Health Organization,},
	year = {1968.},
	series = {(WHO technical report series ; 384)},
	address = {Geneva : }
}