http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
report of a United Nations Expert Group Meeting on Barrier-Free Design, held June 3-8, 1974, at the United Nations Secretariat, New York
United Nations Expert Group Meeting on Barrier-Free Design, New York, 1974.
International Society for Rehabilitation of the Disabled
editors, Susan Hammerman, Barbara Duncan.