Columbia subject headings:
Harvard subject headings:
Agriculture colonies--Italy--Pontine Marshes--History.
Fascism--Italy
Italy--History--1922-1945.
Migration, Internal--Italy--Ferrara Region--History.
Princeton subject headings:
Fascism--Italy--History--20th century.
Ferrara (Italy : Province)--Emigration and immigration--History--20th century.
Land settlement--Italy--Pontine Marshes--History--20th century.
Migration, Internal--Italy--History--20th century.
Peasants--Italy--Pontine Marshes--History--20th century.
Pontine Marshes (Italy)--Emigration and immigration--History--20th century.