TY  - BOOK
AU  - Armbrustmacher,Theodore J.
ED  - United States.
TI  - Abundance and distribution of thorium in the carbonatite stock at Iron Hill, Powderhorn District, Gunnison County, Colorado
T2  - Geological Survey professional paper
AV  - QE516.T5 A74
PY  - 1980///
CY  - Washington
PB  - U.S. Govt. Print. Off.
KW  - Thorium
KW  - Carbonatites
KW  - Colorado
KW  - Gunnison Co
N1  - Bibliography: p. 11
ER  -