TY  - RPRT
TI  - Federal Coal in the United States: A Digital Database of Coal Ownership Status
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1998
DO  - 10.3133/fs01298
UR  - https://pubs.usgs.gov/publication/fs01298
ID  - fs01298
ER  -