Columbia subject headings:
Harvard subject headings:
French literature--History and criticism
Gaul--Languages.
Gaulish language--History.
Gauls--Social life and customs.
Historical linguistics.
Language and culture--Gaul.
Sociolinguistics--Gaul--History.
Sociolinguistics--Gaul--Methodology.
Princeton subject headings:
Gaulish language--Social aspects.
Historical linguistics--Gaul--Methodology.
Sociolinguistics--Gaul--Methodology.