Columbia subject headings:
Harvard subject headings:
Bus lines--Argentina--Buenos Aires Metropolitan Area--Statistics.
Bus lines--Argentina--Buenos Aires Metropolitan Area.
Transportation, Automotive--Argentina--Buenos Aires Metropolitan Area--Statistics.
Transportation, Automotive--Argentina--Buenos Aires Metropolitan Area.
Princeton subject headings:
Bus lines--Argentina--Buenos Aires Metropolitan Area--Statistics.
Bus lines--Argentina--Buenos Aires Metropolitan Area.
Transportation, Automotive--Argentina--Buenos Aires Metropolitan Area--Statistics.
Transportation, Automotive--Argentina--Buenos Aires Metropolitan Area.