Columbia subject headings:
Bologna (Italy)--History--To 1506--Sources.
Law--Italy--Bologna--History--Sources.
Statutes--Italy--Bologna.
Harvard subject headings:
Bologna (Italy)--History--To 1506--Sources.
Law--Italy--Bologna--History--To 1500--Sources.
Law--Italy--Bologna--Sources.
Statutes--Italy--Bologna.
Princeton subject headings:
Bologna (Italy)--History--To 1506--Sources.
Law--Italy--Bologna--History--Sources.
Statutes--Italy--Bologna.