Columbia subject headings:
Agriculture and state--Europe, Eastern--Congresses.
Agriculture and state--Soviet Union--Congresses.
Communism and agriculture--Congresses.
Harvard subject headings:
Agriculture and state--Europe, Eastern--Congresses.
Agriculture and state--Soviet Union--Congresses.
Princeton subject headings:
Agriculture and state--Europe, Eastern--Congresses.
Agriculture and state--Soviet Union--Congresses.
Communism and agriculture--Congresses.