Columbia subject headings:
Patriarchs and patriarchate--Italy--Aquileia--History.
Sacred vocal music--Istria (Croatia and Slovenia)
Sacred vocal music--Italy--Veneto.
Harvard subject headings:
Aquileia Region (Italy)--Church history--Congresses.
Catholic Church. Patriarchate of Aquileia (Italy)--Congresses.
Gregorian chants--Italy--Aquileia Region--Congresses.
Patriarchs and patriarchate--Italy--Aquileia--History.
Sacred vocal music--Istria (Croatia and Slovenia)
Sacred vocal music--Italy--Veneto.
Princeton subject headings:
Patriarchs and patriarchate--Italy--Aquileia--History.
Sacred vocal music--Istria (Croatia and Slovenia).
Sacred vocal music--Italy--Veneto.