http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
tradeoffs between cost and additionality
1 online resource (8 pages) : color illustrations
Title from title screen (viewed July 24, 2012).
Includes bibliographical references (page 8).
Economic brief (United States. Department of Agriculture. Economic Research Service) ; no. 18