Columbia subject headings:
Harvard subject headings:
Germany--Politics and government--Congresses.
National socialism--Congresses.
Political science--Germany--History--20th century--Congresses.
Political science--Germany--History--21st century--Congresses.
Princeton subject headings:
Germany--Politics and government--Congresses.
National socialism--Congresses.
Political science--Germany--History--20th century--Congresses.