http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
evaluation of Pennsylvania's flexible pavement design methodology
Bureau of Materials Testing and Research.
This work was sponsored by the Pennsylvania Department of Transportation and the U. S. Department of Transportation, Federal Highway Administration.
Pennsylvania Transportation Institute report number PTI 7514.
Report (Pennsylvania Transportation Institute) ; PTI 7514