http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Geology of the north unit, Theodore Roosevelt National Memorial Park
"Reprinted from North Dakota History, volume 23, number 2, pp. 53-77, 1956."
Theodore Roosevelt National Memorial Park
Bulletin (North Dakota Geological Survey) ; 32