http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Summary statistics for selenium in vegetation calculated from U.S. Geological Survey data
1 online resource (iii, 31 pages) : illustrations, maps.
Title from title screen (viewed August 28, 2014).
Also available online in PDF format from the U.S. Geological Survey Warehouse (http:/pubs.er.usgs.gov/).
Includes bibliographical references (pages 9-11).