TY  - BOOK
AU  - Anstett,T.F.
ED  - United States.
TI  - Availability of rare-earth, yttrium, and related thorium oxides--market economy countries: a minerals availability appraisal 
T2  - Information circular
U1  - 622 s553.4/94�19 
PY  - 1986///
CY  - [Washington, D.C.]
PB  - U.S. Dept. of the Interior, Bureau of Mines
KW  - Yttrium earths
KW  - Thorium ores
KW  - Rare earths
ER  -