Columbia subject headings:
French language--Middle French, 1300-1600--Orthography and spelling.
French language--Orthography and spelling--History.
Harvard subject headings:
French language--Middle French, 1300-1600--Orthography and spelling.
French language--Orthography and spelling--History.
Princeton subject headings:
French language--18th century--Orthography and spelling.
French language--Middle French, 1300-1600--Orthography and spelling.
French language--Orthography and spelling--History.