Columbia subject headings:
Business enterprises--Germany--History--Periodicals.
Business enterprises--History--Periodicals.
Industries--Germany--History--Periodicals.
Industries--History--Periodicals.
Harvard subject headings:
Business enterprises--Germany--History--Periodicals.
Business enterprises--History--Periodicals.
Industries--Germany--History--Periodicals.
Industries--History--Periodicals.
Princeton subject headings:
Business enterprises--Germany--History--Periodicals.
Industries--Germany--History--Periodicals.