Columbia subject headings:
Communication and traffic--European Economic Community countries--Statistics--Periodicals.
Tourism--European Economic Community countries--Periodicals.
Transportation--European Economic Community countries--Statistics--Periodicals.
Harvard subject headings:
Communication and traffic--European Economic Community countries--Statistics--Periodicals.
Tourism--European Economic Community countries--Statistics--Periodicals.
Transportation--European Economic Community countries--Statistics--Periodicals.
Princeton subject headings:
Telecommunication--European Economic Community countries--Statistics--Periodicals.
Tourism--European Economic Community countries--Statistics--Periodicals.
Transportation--European Economic Community countries--Statistics--Periodicals.