http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Mark Twain National Forest (Poplar Bluff Ranger District), Missouri, 1981
Rev. in 1981 from 1979 topographical quadrangle maps by the USDA Forest Service Geometronics Service Center, and field reiew by the Eastern Region.
compiled and drafted at the Regional Office, Milwaukee, Wisconsin.
Relief shown by hachures and spot heights.
Includes key map and index to Geological Survey topographic maps.