http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Utilizing nitrogen and oxygen isotopes as tracers for manure nutrient fate in the Chesapeake Bay Watershed ... annual report
Water Availability and Watershed Management National Program (U.S.)
Description based on: 2006; title from title screen (viewed July 15, 2009).
Mode of access: Internet via the USDA Agricultural Research Service web site. Address as of 7/15/09: http://www.ars.usda.gov/research/projects/projects.htm?ACCN%5FNO=409815&showpars=true&fy=2006 ; current access available via PURL.
ARS National Programs, 5601 Sunnyside Ave., GWCC 4-2154, Beltsville MD 20705