Columbia subject headings:
Agriculture and state--Germany (East)--Congresses.
Agriculture--Research--Government policy--Germany (East)--Congresses.
Food supply--Government policy--Germany (East)--Congresses.
Industrial policy--Germany (East)--Congresses.
Harvard subject headings:
Agriculture and state--Germany (East)--Congresses.
Agriculture--Research--Government policy--Germany (East)--Congresses.
Food supply--Government policy--Germany (East)--Congresses.
Industrial policy--Germany (East)--Congresses.
Princeton subject headings:
Agricultural productivity--Germany (East)--Congresses.
Agriculture--Economic aspects--Germany (East)--Congresses.
Food supply--Germany (East)--Congresses.