Columbia subject headings:
Agriculture--Economic aspects--Switzerland--Fribourg (Canton)--History.
Fribourg (Switzerland : Canton)--Economic conditions.
Fribourg (Switzerland : Canton)--Social conditions.
Harvard subject headings:
Agriculture--Economic aspects--Switzerland--Fribourg (Canton)--History.
Fribourg (Switzerland : Canton)--Economic conditions.
Fribourg (Switzerland : Canton)--Social conditions.
Princeton subject headings:
Fribourg (Switzerland : Canton)--Economic conditions.
Fribourg (Switzerland : Canton)--History.
Fribourg (Switzerland : Canton)--Social conditions.