Columbia subject headings:
Harvard subject headings:
Agriculture--Economic aspects--Italy--Lombardy--History--19th century--Congresses.
Agriculture--Economic aspects--Italy--Lombardy--History--20th century--Congresses.
Agriculturists--Italy--Lombardy--History--19th century--Congresses.
Agriculturists--Italy--Lombardy--History--20th century--Congresses.
Lombardy (Italy)--Rural conditions--Congresses.
Princeton subject headings:
Agriculture--Economic aspects--Italy--Lombardy--History--19th century--Congresses.
Agriculture--Economic aspects--Italy--Lombardy--History--20th century--Congresses.
Agriculturists--Italy--Lombardy--History--19th century--Congresses.
Agriculturists--Italy--Lombardy--History--20th century--Congresses.
Lombardy (Italy)--Rural conditions--Congresses.