TY  - RPRT
TI  - Thorium and rare-earth minerals in Powderhorn district, Gunnison County, Colorado
AU  - J. C. Olson
AU  - S. R. Wallace
PY  - 1956
DO  - 10.3133/b1027o
UR  - https://pubs.usgs.gov/publication/b1027O
ID  - b1027O
ER  -