http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Geology and ground-water resources of Washington County, Colorado
1 online resource (iv, 46 pages) : illustrations, maps.
"Prepared in cooperation with the Colorado Water Conservation Board."
Includes National Geologic Map Database index page and 4 plates on HTML page.
Geological Survey water-supply paper ; 1777