Columbia subject headings:
Harvard subject headings:
Culture--Study and teaching--History--20th century.
German language--20th century.
German language--Political aspects.
Historical linguistics--20th century.
Language and culture--History--20th century.
Princeton subject headings:
Culture--Study and teaching--History--20th century.
German language--20th century.
German language--Political aspects.
Historical linguistics--20th century.
Language and culture--History--20th century.