http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
v. 1. Urban and rural bus systems -- v. 2. Passenger rail and terminals -- v. 3. Management, performance, and quality of service -- v. 4. Paratransit and emerging technologies -- v. 5. Planning, accessibility, and parking -- v. 6. Marketing, fare policy, and transformative data trends.
"Journal of the Transportation Research Board."
Transportation research record ; 2533, etc