http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
including many original determinations of underground temperature
1 online resource (97 pages, 1 unnumbered page of plates) : illustrations, color map.
Title from title screen (viewed Aug. 27, 2015).
Bulletin (Geological Survey (U.S.)) ; no. 701