Columbia subject headings:
Harvard subject headings:
Agriculture--Economic aspects--Germany (East)
Agriculture--Economic aspects--Germany (East)--History--Congresses.
Agriculture--Economic aspects--Germany--History--21st century--Congresses.
Collectivization of agriculture--Germany (East)--History--Congresses.
Collectivization of agriculture--Germany--History--21st century--Congresses.
Peasants--Germany (East)--Economic conditions--Congresses.
Peasants--Germany--Economic conditions--21st century--Congresses.
Proletariat--Economic conditions--20th century--Congresses.
Proletariat--Economic conditions--21st century--Congresses.
Working class--Germany (East)--Economic conditions--Congresses.
Working class--Germany--Economic conditions--21st century--Congresses.
Princeton subject headings:
Agriculture--Economic aspects--Germany (East)
Collectivization of agriculture--Germany (East)--History--Congresses.