Columbia subject headings:
Harvard subject headings:
German periodicals--History--19th century--Congresses.
German periodicals--History--20th century--Congresses.
Germany--History, Local--Periodicals--Congresses.
Germany--History--Periodicals--Congresses.
Journalism, Regional--Germany--History--19th century--Congresses.
Journalism, Regional--Germany--History--20th century--Congresses.
Princeton subject headings:
German periodicals--History--19th century--Congresses.
German periodicals--History--20th century--Congresses.
Germany--History, Local--Periodicals--History and criticism--Congresses.