Columbia subject headings:
Harvard subject headings:
Cybernetics--Economic aspects--Germany (East)--Congresses.
Cybernetics--Germany (East)--Congresses.
Philosophy of mind--Germany (East)--Congresses.
Princeton subject headings:
Cybernetics--Economic aspects--Germany (East)--Congresses.
Cybernetics--Germany (East)--Congresses.
Philosophy of mind--Germany (East)--Congresses.