@book{9480,
	author = {Bourdillon, R. B. and Bruce, H. M.},
	title = {The quantitative estimation of vitamin D by radiography,},
	publisher = {H. M. Stationery off.,},
	year = {1931.},
	address = {London,},
	note = {At head of title: Privy council.  Medical research council.}
}