http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
1 online resource (4 unnumbered pages) : color illustrations, color map.
by Marjorie Schulz [and four others] ; edited by Monica Erdman.
Fact sheet (Geological Survey (U.S.)) ; 2018-3002