Columbia subject headings:
Bologna (Italy : Province)--Antiquities.
Protohistory.
Tombs--Italy--Bologna.
Harvard subject headings:
Bologna (Italy : Province)--Antiquities.
Excavations (Archaeology)--Italy--Bologna (Province)
Excavations (Archaeology)--Italy--Piediluco Lake.
Piediluco Lake (Italy)--Antiquities.
Princeton subject headings:
Bologna (Italy : Province)--Antiquities.
Bronze age--Italy--Piediluco Lake.
Excavations (Archaeology)--Italy--Bologna (Province).
Excavations (Archaeology)--Italy--Piediluco Lake.
Iron age--Italy--Bologna (Province).
Piediluco Lake (Italy)--Antiquities.