Columbia subject headings:
Bell towers--Italy--Cremona.
Cremona (Italy)--Buildings, structures, etc.
Torrazzo (Cremona, Italy)
Harvard subject headings:
Bell towers--Italy--Cremona.
Cremona (Italy)--Buildings, structures, etc.
Torrazzo (Cremona, Italy)
Princeton subject headings:
Bell towers--Italy--Cremona.
Cremona (Italy)--Buildings, structures, etc.
Torrazzo (Cremona, Italy)