Columbia subject headings:
Germany--Politics and government--20th century--Congresses.
Germany. Verfassung (1919)--Congresses.
Harvard subject headings:
Constitutional history--Germany--Congresses.
Germany--Politics and government--20th century--Congresses.
Germany. Verfassung (1919)--Congresses.
Princeton subject headings:
Germany--Politics and government--20th century--Congresses.
Germany. Verfassung (1919)--Congresses.