Columbia subject headings:
Harvard subject headings:
German language--Social aspects--History--Sources.
German language--Social aspects.
Students--Germany--Language--History--18th century.
Students--Germany--Language--History--19th century.
Princeton subject headings:
German language--Social aspects--History--Sources.
German language--Social aspects.
Students--Germany--Language--History--18th century.
Students--Germany--Language--History--19th century.