International strategic minerals inventory summary report--rare-earth oxides /
Jackson, Wayne D.
Christiansen, Grey.
Washington : U.S. G.P.O.,
1993.
"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."
Includes bibliographical references (p. 66-68).
Earths, Rare.
Strategic materials.