Columbia subject headings:
German language--Dialects--Switzerland--Knutwil.
German language--Dialects--Switzerland--Lucerne.
German language--Variation--Switzerland.
Harvard subject headings:
German language--Dialects--Switzerland.
German language--Variation.
Princeton subject headings:
German language--Dialects--Switzerland--Knutwil.
German language--Dialects--Switzerland--Lucerne.
Germany language--Switzerland--Variation.