Columbia subject headings:
Harvard subject headings:
Abbazia di San Pietro in Perugia--Archives--Catalogs.
Abbazia di San Pietro in Perugia--Archives--History.
Abbazia di San Pietro in Perugia--History--Sources--Bibliography.
Perugia (Italy)--Church history--Sources--Bibliography.
Princeton subject headings:
Abbazia di San Pietro in Perugia--Archives--Catalogs.
Abbazia di San Pietro in Perugia--Archives--History.
Abbazia di San Pietro in Perugia--History--Sources--Bibliography.
Catalogs.
Perugia (Italy)--Church history--Sources--Bibliography.