Columbia subject headings:
Harvard subject headings:
Airports--Environmental aspects--Germany--Flughafen Frankfurt/Main.
Airports--Environmental aspects--Germany.
Flughafen Frankfurt/Main.
Runways (Aeronautics)--Germany--Flughafen Frankfurt/Main.
Runways (Aeronautics)--Germany.
Princeton subject headings:
Airports--Environmental aspects--Germany (West)--Frankfurt.
Environmental protection--Citizen participation.
Runways (Aeronautics)--Germany (West)--Frankfurt.