Columbia subject headings:
Chiesa di San Michele Arcangelo (Roncole Verdi, Italy)--Organs.
Organ (Musical instrument)--Italy--Roncole Verdi.
Organ (Musical instrument)--Maintenance and repair.
Verdi, Giuseppe, 1813-1901.
Harvard subject headings:
Chiesa di San Michele Arcangelo (Roncole Verdi, Italy)--Organs.
Organ (Musical instrument)--Italy--Roncole Verdi.
Organ (Musical instrument)--Maintenance and repair.
Verdi, Giuseppe, 1813-1901.
Princeton subject headings: