Columbia subject headings:
Harvard subject headings:
Agriculture and state--Europe, Central--Congresses.
Agriculture and state--Europe, Eastern--Congresses.
Agriculture--Economic aspects--Europe, Central--Congresses.
Agriculture--Economic aspects--Europe, Eastern--Congresses.
Agriculture--Europe, Central--Congresses.
Agriculture--Europe, Eastern--Congresses.
Princeton subject headings:
Agriculture and state--Europe, Central--Congresses.
Agriculture and state--Europe, Eastern--Congresses.
Agriculture--Economic aspects--Europe, Central--Congresses.
Agriculture--Economic aspects--Europe, Eastern--Congresses.
Agriculture--Europe, Central--Congresses.
Agriculture--Europe, Eastern--Congresses.