http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Design and testing of a process-based groundwater vulnerabilty assessment (P-GWAVA) system for predicting concentrations of agrichemicals in groundwater across the United States
National Water-Quality Assessment Program (U.S.)
1 online resource (xvi, 210 pages) : color illustrations.
Title from title screen (viewed on July 8, 2016).
Scientific investigations report ; 2014-5189