Columbia subject headings:
Harvard subject headings:
FDGB-Feriendienst--History.
Germany (East)--Social policy.
Tourism--Government policy--Germany (East)--History.
Princeton subject headings:
FDGB-Feriendienst.
Germany (East)--Social conditions.
Germany (East)--Social life and customs.
Tourism--Germany (East).
Tourism--Government policy--Germany (East).
Vacations--Germany (East).