TY  - RPRT
TI  - Federal and Indian lands coal, phosphate, potash, sodium, and other mineral production, royalty income, and related statistics; 1920 through calendar year 1980
AU  - U.S. Geological Survey
PY  - 1981
DO  - 10.3133/25180
UR  - https://pubs.usgs.gov/publication/25180
ID  - 25180
ER  -