Columbia subject headings:
Germany (East)--Economic policy--Congresses.
Germany (East)--Social policy--Congresses.
Labor productivity--Germany (East)--Congresses.
Harvard subject headings:
Germany (East)--Economic policy--Congresses.
Germany (East)--Social policy--Congresses.
Labor productivity--Germany (East)--Congresses.
Princeton subject headings:
Germany (East)--Economic policy--Congresses.
Germany (East)--Social policy--Congresses.
Labor productivity--Germany, East--Congresses.