TY  - RPRT
TI  - Abundance and distribution of thorium in the carbonatite stock at Iron Hill, Powderhorn district, Gunnison County, Colorado
AU  - T.J. Armbrustmacher
PY  - 1980
DO  - 10.3133/pp1049b
UR  - https://pubs.usgs.gov/publication/pp1049B
ID  - pp1049B
ER  -