Columbia subject headings:
German language--Foreign elements.
German language--History.
German language--Slang.
German language--Style.
Language and languages.
Harvard subject headings:
German language--Foreign elements
German language--History.
German language--Slang.
German language--Style.
Language and languages
Princeton subject headings:
German language--Foreign elements.
German language--History.
German language--Slang.
German language--Style.
Language and languages.