TY  - RPRT
TI  - Preliminary map of rare-earth provinces in the conterminous United States
AU  - Mortimer Hay Staatz
AU  - Theodore J. Armbrustmacher
PY  - 1981
DO  - 10.3133/ofr79576t
UR  - https://pubs.usgs.gov/publication/ofr79576T
ID  - ofr79576T
ER  -