Columbia subject headings:
Harvard subject headings:
Liguria (Italy)--Population--History.
Liguria (Italy)--Rural conditions.
Piedmont (Italy)--Population--History.
Piedmont (Italy)--Rural conditions.
Princeton subject headings:
Liguria (Italy)--Population--History.
Liguria (Italy)--Rural conditions.
Piedmont (Italy)--Population--History.
Piedmont (Italy)--Rural conditions.