Columbia subject headings:
German language--Orthography and spelling.
German language--Reform--20th century.
German language--Reform--21st century.
German language--Usage.
German literature--Orthography and spelling.
Harvard subject headings:
German language--Orthography and spelling.
German language--Usage.
Princeton subject headings:
German language--Orthography and spelling.
German language--Reform--20th century.
German language--Reform--21st century.
German language--Usage.
German literature--Orthography and spelling.