Columbia subject headings:
Catholic Church. Patriarchate of Aquileia (Italy)--History--Sources--Catalogs.
Gregorian chants--Indexes.
Music--Manuscripts--Catalogs.
Harvard subject headings:
Catholic Church. Patriarchate of Aquileia (Italy)--History--Sources--Catalogs.
Church music--Italy--Aquileia--Sources.
Gregorian chants--Indexes.
Music--Italy--Aquileia--500-1400--Sources.
Music--Manuscripts--Catalogs
Princeton subject headings:
Catalogs.
Catholic Church. Patriarchate of Aquileia (Italy)--History--Sources--Catalogs.
Gregorian chants--Indexes.
Music--Manuscripts--Catalogs.