Columbia subject headings:
Harvard subject headings:
German language--19th century.
German language--Discourse analysis.
German language--Technical German.
Railroads--Germany--History--19th century.
Railroads--Language.
Princeton subject headings:
German language--19th century.
German language--Discourse analysis.
German language--Technical German.
Railroads--Germany--History--19th century.
Railroads--Language.