Columbia subject headings:
Behrens, Fritz, 1909---Congresses.
Economics--Germany (East)--History--Congresses.
Economists--Germany (East)--Congresses.
Intellectuals--Germany (East)--History--Congresses.
Harvard subject headings:
Behrens, Fritz, 1909---Congresses.
Economics--Germany (East)--History--Congresses.
Economists--Germany (East)--Congresses.
Intellectuals--Germany (East)--History--Congresses.
Princeton subject headings:
Behrens, Fritz, 1909---Congresses.