http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Land use and land cover, 1981, Austin, Texas
"Land use and land cover compiled from source materials dated 1981."
"This map is keyed to U.S. Geological Survey 1:250,000-scale topographic map, Austin (NH 14-6)"
Open-file report (Geological Survey (U.S.)) ; 83-555-1