http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
New York air pollution project of 1964-1969
Environmental Sciences Research Laboratory
Also available from the National Technical Information Service (NTIS) as PB277132.
United States Environmental Protection Agency 68-02-1284
Environmental monitoring series ; EPA-600/4-77-035a