Columbia subject headings:
Harvard subject headings:
Church lands--History--Sources.
Church lands--Italy--Modena--History--Sources.
Land tenure--Italy--Modena--History--Sources.
San Pietro (Monastery : Modena, Italy)--History--Sources.
Princeton subject headings:
Church lands--Italy--Modena--History--Sources.
Land tenure--Italy--Modena--History--Sources.
San Pietro (Monastery : Modena, Italy)--History--Sources.