Columbia subject headings:
Harvard subject headings:
Bologna (Italy)--Buildings, structures, etc.
Bologna (Italy)--Church history.
Catholic Church--Bibliography--Catalogs.
SS. Salvatore (Church : Bologna, Italy)
SS. Salvatore (Church : Bologna, Italy). Biblioteca--Catalogs.
Theology--Bibliography--Catalogs.
Princeton subject headings:
Canonici regolari del SS. Salvatore--Italy--Bologna--History.
Chiesa del SS. Salvatore (Bologna, Italy)--History.
Chiesa del SS. Salvatore (Bologna, Italy)--Library--Catalogs.