http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
ix, 485 pages : illustrations, maps, digital, PDF file.
United States Department of Agriculture, Natural Resources Conservation Service ; in cooperation with Texas Agricultural Experiment Station.
Electronic reproduction. [Washington, D.C.?] : Natural Resources Conservation Service. Mode of access: World Wide Web.
Includes bibliographical references (pages 285-286).