http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Evaluation of the Sierra, hanging, quick-don, crew, pressure-breathing, oxygen mask
Ernest B. McFadden, Michael T. Lategola.
Electronic reproduction. Washington, D.C. : FAA. Mode of access: Internet from the FAA web site. Address as of 2/23/07: http://www.faa.gov/library/reports/medical/oamtechreports/1960s/media/AM66-20.pdf; current access is available via PURL.