Columbia subject headings:
Harvard subject headings:
Bilingualism--Switzerland--Fribourg (Canton)--History.
Bilingualism--Switzerland--History.
Language policy--Switzerland--Fribourg (Canton)--History.
Language policy--Switzerland--History.
Princeton subject headings:
Bilingualism--Switzerland--Fribourg (Canton)--History.
Bilingualism--Switzerland--History.
Language policy--Switzerland--Fribourg (Canton)--History.
Language policy--Switzerland--History.