http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
1 online resource (2 unnumbered pages) : color illustrations.
GPO Cataloging Record Distribution Program (CRDP).
Includes bibliographical references (page 2).
Fact sheet (Geological Survey (U.S.)) ; 2022-3053