@book{71246,
	author = {Towner, R. R.},
	title = {International strategic minerals inventory summary report--zirconium},
	publisher = {U.S. G.P.O.},
	year = {1992.},
	series = {U.S. Geological Survey circular},
	address = {Washington},
	note = {"Prepared as a cooperative effort among earth-science and mineral-resource agencies of Australia, Canada, the Federal Republic of Germany, the Republic of South Africa, the United Kingdom, and the United States of America."}
}