Columbia subject headings:
FDGB-Feriendienst.
Tourism--Germany (East)--History.
Tourism--Political aspects--Germany (East)
Vacations--Germany (East)--History.
Harvard subject headings:
FDGB-Feriendienst--History.
Tourism--Government policy--Germany (East)--History.
Princeton subject headings:
FDGB-Feriendienst--History.
Tourism--Government policy--Germany (East)--History.