Columbia subject headings:
Harvard subject headings:
German language--Compound words--History.
German language--History--18th century.
German language--History--19th century.
German language--Orthography and spelling--History.
German language--Written German--History.
Princeton subject headings:
German language--Compound words--History.
German language--History--18th century.
German language--History--19th century.
German language--Orthography and spelling--History.
German language--Written German--History.