http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
National summary of state water quality standards
Definitions, water quality standards criteria summaries, a compilation of state/federal criteria
Water quality standards criteria summaries
Office of Water Regulations and Standards.
prepared for United States Environmental Protection Agency ; prepared by Nalesnik Associates Incorporated.
Title from title screen (viewed Dec. 19, 2013).
"Office of Water Regulation and Standards"--Cover.