Columbia subject headings:
Harvard subject headings:
Economics--Congresses
Economics--Germany--History--20th century--Congresses.
Economics--Sociological aspects--History--20th century.
Germany--Economic policy--20th century--Congresses.
Schools of economics--Germany--Freiburg im Breisgau--Congresses.
Princeton subject headings:
Economics--Congresses.
Economics--Germany--History--20th century--Congresses.
Economics--Sociological aspects--History--20th century.
Germany--Economic policy--20th century--Congresses.
Schools of economics--Germany--Freiburg im Breisgau--Congresses.