Columbia subject headings:
Harvard subject headings:
Aeronautics, Military--Germany (East)--History.
Airplanes--Germany--Schönfeld--Design and construction--History--20th century.
Airports--Germany--Schönfeld--History--20th century.
Flughafen Berlin-Schönefeld--History--20th century.
Princeton subject headings:
Aeronautics, Military--Germany (East)--History.
Airplanes--Germany--Schönfeld--Design and construction--History--20th century.
Airports--Germany--Schönfeld--History--20th century.
Flughafen Berlin-Schönefeld--History--20th century.