Columbia subject headings:
Germany, Southern--History--20th century--Congresses.
National socialism--France--Alsace--Congresses.
National socialism--France--Strasbourg--Congresses.
National socialism--Germany--Karlsruhe--Congresses.
Rhine River Valley--History--20th century--Congresses.
Harvard subject headings:
Baden-Württemberg (Germany)--Politics and government--20th century--Congresses.
National socialism--Rhine River Valley--Congresses.
Rhine River Valley--Politics and government--20th century--Congresses.
Princeton subject headings: