Columbia subject headings:
Business--History--Periodicals.
Germany--Commerce--History--Periodicals.
Industries--Germany--History--Periodicals.
Harvard subject headings:
Commerce--Periodicals
Economic history--Periodicals
Germany--Commerce--Periodicals.
Germany--Economic conditions--Periodicals.
Princeton subject headings:
Commerce--Periodicals.
Economic history--Periodicals.
Germany--Commerce--Periodicals.
Germany--Economic conditions--Periodicals.
Periodicals.