Columbia subject headings:
Emilia-Romagna (Italy)--Antiquities--Congresses.
Excavations (Archaeology)--Italy--Po River Watershed--Congresses.
Italy--Antiquities--Congresses.
Po River Watershed (Italy)--Congresses.
Prehistoric peoples--Italy--Po River Watershed--Congresses.
Veneto (Italy)--Antiquities--Congresses.
Harvard subject headings:
Excavations (Archaeology)--Italy--Po Basin--Congresses.
Italy--Antiquities--Congresses.
Po Basin (Italy)--Antiquities--Congresses.
Princeton subject headings:
Excavations (Archaeology)--Italy--Po Basin--Congresses.
Italy--Antiquities--Congresses.
Po Basin (Italy)--Antiquities--Congresses.