Columbia subject headings:
Fribourg (Switzerland)--History--18th century.
Fribourg (Switzerland)--Politics and government--18th century.
Informers--Switzerland--Fribourg--History--18th century.
Harvard subject headings:
Fribourg (Switzerland)--History--18th century.
Fribourg (Switzerland)--Politics and government--18th century.
Informers--Switzerland--Fribourg--History--18th century.
Princeton subject headings:
Fribourg (Switzerland)--History--18th century.
Fribourg (Switzerland)--Politics and government--18th century.
Informers--Switzerland--Fribourg--History--18th century.