Columbia subject headings:
Emilia-Romagna (Italy)--History--Sources.
Statutes--Italy--Emilia-Romagna--History--Sources.
Harvard subject headings:
Emilia-Romagna (Italy)--History--Sources.
Law--Italy--Emilia-Romagna--Sources.
Ordinances, Municipal--Italy--Emilia-Romagna--History--Sources.
Statutes--Italy--Emilia-Romagna--History--Sources.
Princeton subject headings:
Statutes--Italy--Emilia-Romagna--History--Sources.