http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Bedrock-surface altitude in the midwestern basins and arches region of Indiana, Ohio, Michigan, and Illinois
National Regional Aquifer Systems Analysis Program (U.S.)
Includes text, 1 chart, and 2 location maps.
Water-resources investigations report ; 93-4050