Columbia subject headings:
Businesspeople--Germany--Biography--Congresses.
Businesspeople--Germany--History--Congresses.
Businesspeople--History--Congresses.
Entrepreneurship--Germany--History--Congresses.
Entrepreneurship--History--Congresses.
Harvard subject headings:
Businesspeople--Germany--Biography--Congresses.
Businesspeople--Germany--History--Congresses.
Businesspeople--History--Congresses.
Entrepreneurship--Germany--History--Congresses.
Entrepreneurship--History--Congresses.
Princeton subject headings:
Businesspeople--Germany--Biography--Congresses.
Businesspeople--Germany--History--Congresses.
Entrepreneurship--Germany--History--Congresses.
Entrepreneurship--History--Congresses.