http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
conceptual framework and considerations on the use of PPM-based trade measures
Organisation for Economic Co-operation and Development
Joint Session of Trade and Environment Experts.
Produced by the OECD Joint Session of Trade and Environment Experts as part of the OECD work programme on trade and environment.
Includes bibliographical references (pages 49-52).