TY  - RPRT
TI  - Rare Earth Element Mines, Deposits, and Occurrences
AU  - Greta J. Orris
AU  - Richard I. Grauch
PY  - 2002
DO  - 10.3133/ofr02189
UR  - https://pubs.usgs.gov/publication/ofr02189
ID  - ofr02189
ER  -