Columbia subject headings:
Harvard subject headings:
Frosinone (Italy : Province)--Economic conditions--Sources.
Frosinone (Italy : Province)--Economic conditions.
Frosinone (Italy : Province)--Politics and government--Sources.
Frosinone (Italy : Province)--Politics and government.
Princeton subject headings:
Frosinone (Italy : Province)--Economic conditions--Sources.
Frosinone (Italy : Province)--Economic conditions.
Frosinone (Italy : Province)--History--Sources.
Frosinone (Italy : Province)--History.
Frosinone (Italy : Province)--Politics and government--Sources.
Frosinone (Italy : Province)--Politics and government.