TY  - RPRT
TI  - Preliminary map of thorium provinces in the conterminous United States
AU  - Mortimer Hay Staatz
AU  - Theodore J. Armbrustmacher
PY  - 1982
DO  - 10.3133/ofr79576u
UR  - https://pubs.usgs.gov/publication/ofr79576U
ID  - ofr79576U
ER  -