http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
1 online resource (31 pages, XI pages of plates) : illustrations, maps.
by G.K. Gilbert, accompanied by a report on the survey of the crest, by W. Carvel Hall.
Title from title screen (viewed Aug. 31, 2015).
Bulletin (Geological Survey (U.S.)) ; no. 306