Columbia subject headings:
Harvard subject headings:
Capri Island (Italy)
Ischia Island (Italy)
Procida Island (Italy)
Princeton subject headings:
Capri Island (Italy)--Economic conditions.
Capri Island (Italy)--Population.
Capri Island (Italy)--Social conditions.
Ischia Island (Italy)--Economic conditions.
Ischia Island (Italy)--Population.
Ischia Island (Italy)--Social conditions.
Procida Island (Italy)--Economic conditions.
Procida Island (Italy)--Population.
Procida Island (Italy)--Social conditions.