http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Dynamic properties of subgrade soils, including environmental effects
Subgrade soils, including environmental effects
Structural and geometric design of highway-railroad grade crossings
by Earl Victor Edris, Jr. and Robert L. Lytton.
Research study 2-18-74-164. Structural and geometric design of highway-railroad grade crossings. In cooperation with Texas State Department of Highways and Public Transportation and Federal Highway Administration.