http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
1 online resource (488 pages, 1 page of plates) : illustrations, maps.
"Series M, General hydrographic investigations, 5."
Includes bibliographical references and index.
Water-supply and irrigation papers of the United States Geological Survey ; no. 81