http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
U.S. Geological Survey National Coal Resource Assessment
Title from title screen (viewed on June 17, 2004).
Mode of access: Internet from the USGS web site. Address as of 6/17/04: http://pubs.usgs.gov/fs/fs020-01/fs020-01.pdf; current access is available via PURL.
National Coal Resource Assessment (U.S.)
The U.S. Geological Survey national coal resource assessment
Fact sheet (Geological Survey (U.S.)) ; FS-01-020