Columbia subject headings:
Harvard subject headings:
Umbria (Italy)--History--19th century.
Umbria (Italy)--History--20th century.
Umbria (Italy)--Politics and government--19th century.
Umbria (Italy)--Politics and government--20th century.
Princeton subject headings:
Umbria (Italy)--History--19th century.
Umbria (Italy)--History--20th century.
Umbria (Italy)--Politics and government--19th century.
Umbria (Italy)--Politics and government--20th century.