Columbia subject headings:
Communication in politics.
German language--History--20th century.
National socialism.
Harvard subject headings:
Communication in politics--Congresses.
German language--History--20th century--Congresses.
German language--Political aspects--History--20th century--Congresses.
National socialism--Congresses
Princeton subject headings:
Communication in politics.
German language--History--20th century.
National socialism.