http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
What technicians and contractors need to know about phasing out HCFC refrigerants to protect the ozone layer
Title from title screen (viewed on Jan. 23, 2009).
Mode of access: Internet from the EPA web site. Address as of 1/23/2009: http://www.epa.gov/Ozone/title6/downloads/TechniciansBrochure12-08-06.pdf ; current access available via PURL.