Columbia subject headings:
Ethnology--Germany--Upper Lusatia.
Sorbian languages.
Sorbs--Ethnic identity.
Sorbs--Germany--Upper Lusatia.
Harvard subject headings:
Ethnology--Germany--Upper Lusatia.
Language maintenance--Germany--Bautzen.
Sorbian languages.
Sorbian philology--Germany--Bautzen--History--20th century.
Sorbs--Ethnic identity--History--20th century.
Sorbs--Ethnic identity.
Sorbs--Germany--Upper Lusatia.
Princeton subject headings:
Ethnology--Germany--Upper Lusatia.
Sorbian languages.
Sorbs--Ethnic identity.
Sorbs--Germany--Upper Lusatia.