http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
U.S. Dept. of Agriculture, Bureau of Soils ; soils surveyed by George N. Coffey, and party.
Shows distribution of soil types by colors and symbols.
"Field Operations, Bureau of Soils, 1909."
Detached from: Reconnoissance soil survey of South Texas.